People watch game 5 of the NBA Finals between the Golden State Warriors and Cleveland Cavaliers at Fort Green in Oakland, California U.S. June 12, 2017. REUTERS/Stephen Lam 

People react to a call during game 5 of the NBA Finals against the Cleveland Cavaliers at Fort Green in Oakland, California U.S. June 12, 2017. REUTERS/Stephen Lam 

People react to a call during game 5 of the NBA Finals against the Cleveland Cavaliers at Fort Green in Oakland, California U.S. June 12, 2017. REUTERS/Stephen Lam 

A woman uses the Oculus virtual reality headset in a green room during the annual Facebook F8 developers conference in San Jose, California, U.S., April 18, 2017. REUTERS/Stephen Lam 

A Seagull flies over water in St. Stephen's Green in Dublin, Ireland November 29, 2016. REUTERS/Clodagh Kilcoyne 

Seagulls fight over a jaffa cake biscuit in St. Stephen's Green in Dublin, Ireland November 29, 2016. REUTERS/Clodagh Kilcoyne 

A pigeon lands on the shoulder of a man who was feeding them in St. Stephen's Green in Dublin, Ireland November 29, 2016. REUTERS/Clodagh Kilcoyne 

Seagulls fight over a jaffa cake biscuit in St. Stephen's Green in Dublin, Ireland November 29, 2016. REUTERS/Clodagh Kilcoyne 

Seagull fight over a jaffa cake biscuit in St. Stephen's Green in Dublin, Ireland November 29, 2016. REUTERS/Clodagh Kilcoyne 

A pair of seagulls fight in St. Stephen's Green in Dublin, Ireland November 29, 2016. REUTERS/Clodagh Kilcoyne 

A Seagull flies over water in St. Stephen's Green in Dublin, Ireland November 29, 2016. REUTERS/Clodagh Kilcoyne 

A man feeds pigeons in St. Stephen's Green in Dublin, Ireland November 29, 2016. REUTERS/Clodagh Kilcoyne 

Golden State Warriors players Draymond Green (L) and Stephen Curry (R) flank U.S. President Barack Obama who holds up a jersey given to him at an event honoring the 2015 NBA basketball champions at the White House in Washington February 4, 2016. REUTERS/Kevin Lamarque

L-R: Conservative Leader Stephen Harper, NDP Leader Tom Mulcair, Green party Leader Elizabeth May and Liberal Leader Justin Trudeau take part in the French-language debate in Montreal September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Adrian Wyld/Pool 

2nd L- 2nd R: Bloc Quebecois Leader Gilles Duceppe, Conservative Leader Stephen Harper, NDP Leader Tom Mulcair, Green party Leader Elizabeth May and Liberal Leader Justin Trudeau are flanked by debate moderators (seated) as they take part in the French-language debate in Montreal September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Adrian Wyld/Pool 

Clockwise L-R: Conservative Leader Stephen Harper, NDP Leader Tom Mulcair, Green party Leader Elizabeth May and Liberal Leader Justin Trudeau take part in the French-language debate in Montreal September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Adrian Wyld/Pool 

Clockwise L-R: Bloc Quebecois Leader Gilles Duceppe, Conservative Leader Stephen Harper, NDP Leader Tom Mulcair, Green party Leader Elizabeth May and Liberal Leader Justin Trudeau take part in the French-language debate in Montreal September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Adrian Wyld/Pool 

Green Party leader Elizabeth May (R) speaks as Conservative leader and Prime Minister Stephen Harper (L), Bloc Quebecois leader Gilles Duceppe (2nd L) and New Democratic Party leader Thomas Mulcair look on during the French language leaders' debate in Montreal, Quebec September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Christinne Muschi 

(L-R) Conservative leader and Prime Minister Stephen Harper, New Democratic Party leader Thomas Mulcair and Green Party leader Elizabeth May take part in the French language leaders' debate in Montreal, Quebec September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Christinne Muschi 

NDP Leader Tom Mulcair (2nd L) speaks as Conservative Leader Stephen Harper (L), Liberal Leader Justin Trudeau (2nd R) and Green party Leader Elizabeth May (R) take part in the French-language debate in the French-language leaders debate in Montreal September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Adrian Wyld/Pool 

(Standing, L-R) Bloc Quebecois leader Gilles Duceppe, Conservative leader and Prime Minister Stephen Harper, New Democratic Party leader Thomas Mulcair, Green Party leader Elizabeth May and Liberal leader Justin Trudeau take part in the French language leaders' debate in Montreal, Quebec September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Christinne Muschi 

(Standing, L-R) Bloc Quebecois leader Gilles Duceppe, Conservative leader and Prime Minister Stephen Harper, New Democratic Party leader Thomas Mulcair, Green Party leader Elizabeth May and Liberal leader Justin Trudeau take part in the French language leaders' debate in Montreal, Quebec September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Christinne Muschi 

Conservative Leader Stephen Harper (L), NDP Leader Tom Mulcair and Green party leader Elizabeth May (R) take part in the French-language debate in Montreal September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Adrian Wyld/Pool 

L-R: Bloc Quebecois leader Gilles Duceppe, Conservative leader Stephen Harper, NDP leader Tom Mulcair, Green party leader Elizabeth May and Liberal leader Justin Trudeau debate in the French language leaders debate in Montreal September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Adrian Wyld/Pool 

L-R: Bloc Quebecois leader Gilles Duceppe, Conservative leader Stephen Harper, NDP leader Tom Mulcair, Green party leader Elizabeth May and Liberal leader Justin Trudeau pose for photos before the french language leaders debate in Montreal September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Adrian Wyld/Pool 

L-R: Bloc Quebecois Leader Gilles Duceppe, Conservative Leader Stephen Harper, NDP Leader Tom Mulcair, Green party Leader Elizabeth May and Liberal Leader Justin Trudeau pose for photos before the French-language leaders' debate in Montreal September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Adrian Wyld/Pool 

L-R: Green party Leader Elizabeth May, NDP Leader Tom Mulcair, Bloc Quebecois Leader Gilles Duceppe, Conservative Leader Stephen Harper, and Liberal Leader Justin Trudeau pose for photos before the French- language debate in Montreal September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Adrian Wyld/Pool 

L-R: Green party Leader Elizabeth May, NDP Leader Tom Mulcair, Bloc Quebecois Leader Gilles Duceppe, Conservative Leader Stephen Harper, and Liberal Leader Justin Trudeau pose for photos before the French-language leaders' debate in Montreal September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Adrian Wyld/Pool 

(L-R) Bloc Quebecois leader Gilles Duceppe, Conservative leader and Prime Minister Stephen Harper, New Democratic Party leader Thomas Mulcair, Green Party leader Elizabeth May and Liberal leader Justin Trudeau pose before the start of the French language leaders' debate in Montreal, Quebec September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Christinne Muschi 

(L-R) Bloc Quebecois leader Gilles Duceppe, Conservative leader and Prime Minister Stephen Harper, New Democratic Party leader Thomas Mulcair, Green Party leader Elizabeth May and Liberal leader Justin Trudeau shake hands before the start of the French language leaders' debate in Montreal, Quebec September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Christinne Muschi 

(L-R) Bloc Quebecois leader Gilles Duceppe, Conservative leader and Prime Minister Stephen Harper, New Democratic Party leader Thomas Mulcair, Green Party leader Elizabeth May and Liberal leader Justin Trudeau shake hands before the start of the French language leaders' debate in Montreal, Quebec September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Christinne Muschi 

(L-R) Bloc Quebecois leader Gilles Duceppe, Conservative leader and Prime Minister Stephen Harper, New Democratic Party leader Thomas Mulcair, Green Party leader Elizabeth May and Liberal leader Justin Trudeau pose before the start of the French language leaders' debate in Montreal, Quebec September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Christinne Muschi 

(L-R) Bloc Quebecois leader Gilles Duceppe, Conservative leader and Prime Minister Stephen Harper, New Democratic Party leader Thomas Mulcair, Green Party leader Elizabeth May, and Liberal leader Justin Trudeau pose before the start of the French language leaders' debate in Montreal, Quebec September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Christinne Muschi 

(L-R) Bloc Quebecois leader Gilles Duceppe, Conservative leader and Prime Minister Stephen Harper, New Democratic Party leader Thomas Mulcair, Green Party leader Elizabeth May and Liberal leader Justin Trudeau pose before the start of the French language leaders' debate in Montreal, Quebec September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Christinne Muschi 

(L-R) Green Party leader Elizabeth May, New Democratic Party leader Thomas Mulcair, Bloc Quebecois leader Gilles Duceppe, Conservative leader and Prime Minister Stephen Harper and Liberal leader Justin Trudeau pose before the start of the French language leaders' debate in Montreal, Quebec September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Christinne Muschi 

Canada's Green Party leader Elizabeth May (L), New Democratic Party leader Thomas Mulcair (2nd L), Liberal leader Justin Trudeau and Conservative leader Prime Minister Stephen Harper (R) are pictured in this combination photograph during the Maclean's National Leaders debate in Toronto, August 6, 2015. Canadians go to the polls in a national election on October 19, 2015. REUTERS/Mark Blinch 

Liberal leader Justin Trudeau (L), Green Party leader Elizabeth May (2nd L) and New Democratic Party leader Thomas Mulcair listen as Conservative Leader Stephen Harper (R) speaks during the first leaders' debate in Toronto August 6, 2015 . REUTERS/Mark Blinch 

Canada's Liberal leader Justin Trudeau (L), shakes hands with Conservative leader Prime Minister Stephen Harper as Green Party leader Elizabeth May (2nd R) greets NDP leader Thomas Mulcair (R) following the Maclean's National Leaders debate in Toronto, August 6, 2015. Canadians go to the polls in a national election on October 19, 2015. REUTERS/Frank Gunn/Pool 

Canada's Green Party leader Elizabeth May (L) shakes hands with NDP leader Thomas Mulcair as Conservative leader Prime Minister Stephen Harper (R) looks on following the Maclean's National Leaders debate in Toronto, August 6, 2015. Canadians go to the polls in a national election on October 19, 2015. REUTERS/Mark Blinch (CANADA - Tags: POLITICS ELECTIONS)

Canada's Green Party leader Elizabeth May (2nd R) shakes hands with Conservative leader Prime Minister Stephen Harper following the Maclean's National Leaders debate in Toronto, August 6, 2015. Canadians go to the polls in a national election on October 19, 2015. REUTERS/Mark Blinch 

Canada's Liberal leader Justin Trudeau (L), Green Party leader Elizabeth May (2nd L), New Democratic Party (NDP) leader Thomas Mulcair and Conservative Prime Minister Stephen Harper (R) pose ahead of the Maclean's National Leaders debate in Toronto, August 6, 2015. Canadians go to the polls in a national election on October 19, 2015. REUTERS/Frank Gunn/Pool

Canada's Liberal leader Justin Trudeau (L), Green Party leader Elizabeth May (2nd L), New Democratic Party (NDP) leader Thomas Mulcair and Conservative Prime Minister Stephen Harper (R) pose ahead of the Maclean's National Leaders debate in Toronto, August 6, 2015. Canadians go to the polls in a national election on October 19, 2015. REUTERS/Mark Blinch

Canada's Liberal leader Justin Trudeau (L), Green Party leader Elizabeth May (2nd L), New Democratic Party (NDP) leader Thomas Mulcair and Conservative Prime Minister Stephen Harper (R) pose ahead of the Maclean's National Leaders debate in Toronto, August 6, 2015. Canadians go to the polls in a national election on October 19, 2015. REUTERS/Mark Blinch

Canada's Liberal leader Justin Trudeau (L), Green Party leader Elizabeth May (2nd L), New Democratic Party (NDP) leader Thomas Mulcair (2nd R) and Conservative Prime Minister Stephen Harper (R) pose with moderator Paul Wells (C), political editor of Maclean's during the Maclean's National Leaders debate in Toronto, August 6, 2015. Canadians go to the polls in a national election on October 19, 2015. REUTERS/Mark Blinch

(L-R) Canada's Green Party leader Elizabeth May, Liberal leader Justin Trudeau, New Democratic Party (NDP) leader Thomas Mulcair and Conservative Prime Minister Stephen Harper confer before the Maclean's National Leaders debate in Toronto, August 6, 2015. Canadians go to the polls in a national election on October 19, 2015. REUTERS/Mark Blinch

Liberal leader Justin Trudeau (L), Green Party leader Elizabeth May (2nd L) and New Democratic Party leader Thomas Mulcair listen as Conservative Leader Stephen Harper (R) speaks during the first leaders' debate in Toronto August 6, 2015 . REUTERS/Frank Gunn/Pool 

Canada's Liberal leader Justin Trudeau (2nd L), Green Party leader Elizabeth May, New Democratic Party (NDP) leader Thomas Mulcair (2nd R) and Conservative Prime Minister Stephen Harper (R) await moderator Paul Wells (L), political editor of Maclean's ahead of the Maclean's National Leaders debate in Toronto, August 6, 2015. Canadians go to the polls in a national election on October 19, 2015. REUTERS/Mark Blinch

Conservative leader Prime Minister Stephen Harper speaks during the Maclean's National Leaders debate in Toronto, August 6, 2015. Canadians go to the polls in a national election on October 19, 2015. REUTERS/Mark Blinch

Green Party leader Elizabeth May (L) and Conservative Leader Prime Minister Stephen Harper (R) look on as New Democratic Party leader Thomas Mulcair speaks during the first leaders' debate in Toronto August 6, 2015 . REUTERS/Mark Blinch 

Liberal leader Justin Trudeau (L), Green Party leader Elizabeth May (2nd L) and New Democratic Party leader Thomas Mulcair listen as Conservative Leader Stephen Harper (R) speaks during the first leaders' debate in Toronto August 6, 2015 . REUTERS/Frank Gunn/Pool 

Liberal leader Justin Trudeau (L), Green Party leader Elizabeth May (2nd L) and New Democratic Party leader Thomas Mulcair listen as Conservative Leader Stephen Harper (R) speaks during the first leaders' debate in Toronto August 6, 2015 . REUTERS/Frank Gunn/Pool 

Liberal leader Justin Trudeau (L), Green Party leader Elizabeth May (2nd L) and New Democratic Party leader Thomas Mulcair listen as Conservative Leader Stephen Harper (R) speaks during the first leaders' debate in Toronto August 6, 2015 . REUTERS/Frank Gunn/Pool 

Conservative leader Prime Minister Stephen Harper speaks during the Maclean's National Leaders debate in Toronto, August 6, 2015. Canadians go to the polls in a national election on October 19, 2015. REUTERS/Mark Blinch

Golf - Aberdeen Asset Management Scottish Open - Gullane Golf Club, East Lothian, Scotland - 9/7/15
Stephen Gallacher of Scotland acknowledges the crowd on the 10th green during the first round
Action Images via Reuters / Lee Smith
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Golf - Aberdeen Asset Management Scottish Open - Gullane Golf Club, East Lothian, Scotland - 9/7/15
Stephen Gallacher of Scotland on the 10th green during the first round
Action Images via Reuters / Lee Smith
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Sinn Fein President Gerry Adams speaks on the phone in St Stephens Green, while campaigning for a yes vote in Ireland' same-sex marriage referendum, in Dublin, Ireland May 20, 2015. Irish Prime Minister Enda Kenny said on Sunday that Ireland must seize its opportunity to become the first country to approve same-sex marriage in a popular vote when it holds a referendum on the issue on Friday.REUTERS/Cathal McNaughton 

Sinn Fein President Gerry Adams speaks on the phone in St Stephens Green, while campaigning for a yes vote in Ireland' same-sex marriage referendum, in Dublin, Ireland May 20, 2015. Irish Prime Minister Enda Kenny said on Sunday that Ireland must seize its opportunity to become the first country to approve same-sex marriage in a popular vote when it holds a referendum on the issue on Friday. REUTERS/Cathal McNaughton TPX IMAGES OF THE DAY 

Sinn Fein President Gerry Adams speaks on the phone in St Stephens Green, while campaigning for a yes vote in Ireland' same-sex marriage referendum, in Dublin, Ireland May 20, 2015. Irish Prime Minister Enda Kenny said on Sunday that Ireland must seize its opportunity to become the first country to approve same-sex marriage in a popular vote when it holds a referendum on the issue on Friday.REUTERS/Cathal McNaughton 

Sinn Fein President Gerry Adams speaks on the phone in St Stephens Green, while campaigning for a yes vote in Ireland' same-sex marriage referendum, in Dublin, Ireland May 20, 2015. Irish Prime Minister Enda Kenny said on Sunday that Ireland must seize its opportunity to become the first country to approve same-sex marriage in a popular vote when it holds a referendum on the issue on Friday.REUTERS/Cathal McNaughton 

Golf - BMW PGA Championship - Virginia Water, Surrey, England - 19/5/15
Scotland's Stephen Gallacher on the putting green during practice
Action Images via Reuters / Andrew Boyers
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