A manual wheel for grinding sesame, which operates by water, is seen at a sesame factory in Dohuk, Iraq March 10, 2018. Picutre taken March 10, 2018. REUTERS/Ari Jalal 

Icebergs grind against the shallows off the Rothera base, run by the British Antarctic Survey, on the Antarctic Peninsula, January 25, 2009. REUTERS/Alister Doyle/File Photo 

An internally displaced Syrian man grinds coffee inside his tent in Jrzinaz camp, in the southern part of Idlib, Syria, June 21, 2016. EUTERS/Khalil Ashawi 

A foundry worker grinds and polishes a partially finished bronze British Academy of Film and Television Awards (BAFTA) mask at a foundry in west London, Britain February 4, 2016. The masks are being cast and finished at the foundry ahead of the 2016 BAFTA Awards Ceremony which takes place in London on February 14. REUTERS/Stefan Wermuth 

A foundry worker grinds and polishes a partially finished bronze British Academy of Film and Television Awards (BAFTA) mask at a foundry in west London, Britain February 4, 2016. The masks are being cast and finished at the foundry ahead of the 2016 BAFTA Awards Ceremony which takes place in London on February 14. REUTERS/Stefan Wermuth 

Emergency services and crash investigation officers work at the site where a Hawker Hunter fighter jet crashed onto the A27 road at Shoreham near Brighton, Britain August 23, 2015. A jet aircraft ploughed into several cars on a busy road near an airshow in southern England on Saturday, killing at least seven people, police said. REUTERS/Luke MacGregor 

Emergency services and crash investigation officers work at the site where a Hawker Hunter fighter jet crashed onto the A27 road at Shoreham near Brighton, Britain August 23, 2015. A jet aircraft ploughed into several cars on a busy road near an airshow in southern England on Saturday, killing at least seven people, police said. REUTERS/Luke MacGregor 

Emergency services and crash investigation officers work at the site where a Hawker Hunter fighter jet crashed onto the A27 road at Shoreham near Brighton, Britain August 23, 2015. A jet aircraft ploughed into several cars on a busy road near an airshow in southern England on Saturday, killing at least seven people, police said. REUTERS/Luke MacGregor 

Emergency services and crash investigation officers work at the site where a Hawker Hunter fighter jet crashed onto the A27 road at Shoreham near Brighton, Britain August 23, 2015. A jet aircraft ploughed into several cars on a busy road near an airshow in southern England on Saturday, killing at least seven people, police said. REUTERS/Luke MacGregor 

Emergency services and crash investigation officers work at the site where a Hawker Hunter fighter jet crashed onto the A27 road at Shoreham near Brighton, Britain August 23, 2015. A jet aircraft ploughed into several cars on a busy road near an airshow in southern England on Saturday, killing at least seven people, police said. REUTERS/Luke MacGregor 

Emergency services and crash investigation officers work at the site where a Hawker Hunter fighter jet crashed onto the A27 road at Shoreham near Brighton, Britain August 23, 2015. A jet aircraft ploughed into several cars on a busy road near an airshow in southern England on Saturday, killing at least seven people, police said. REUTERS/Luke MacGregor 

A man grinds corn stalk to sell as animal feed at a shop in Quetta November 6, 2011. REUTERS/Naseer Ahmed (PAKISTAN - Tags: SOCIETY FOOD) 

A man makes a stone grinder at his shop in Faisalabad, Punjab province, June 28, 2011. Many in villages use it on commercial basis for crushing wheat and lentils. REUTERS/Fayyaz Hussain (PAKISTAN - Tags: SOCIETY BUSINESS FOOD) 

Cocoa beans are unloaded at PT Bumitangerang Mesindotama, Indonesia's second largest cocoa grinder in Indonesia's West Java province August 24, 2010. Indonesia's hefty tax on cocoa bean exports may push firms to expand domestic processing, but also risks reducing the country's bean output if farmers are put off rejuvenating ageing trees. Picture taken August 24, 2010. To match Analysis COCOA-INDONESIA/ REUTERS/Beawiharta (INDONESIA - Tags: BUSINESS FOOD) 

A worker shows chocolate granule at PT Bumitangerang Mesindotama, Indonesia's second largest cocoa grinder in Indonesia's West Java province August 24, 2010. Indonesia's hefty tax on cocoa bean exports may push firms to expand domestic processing, but also risks reducing the country's bean output if farmers are put off rejuvenating ageing trees. Picture taken August 24, 2010. To match Analysis COCOA-INDONESIA/ REUTERS/Beawiharta (INDONESIA - Tags: BUSINESS FOOD) 

A stone grinder mixes cane sugar with cacao "nibs" at the Mast Brothers Chocolate factory in the Brooklyn borough of New York July 8, 2010. Rick and Michael Mast currently run the company as the only "bean to bar" chocolate making company in New York and one of the few in the United States. The company takes all the steps in the manufacturing process from importing and roasting the beans to making the finished product. REUTERS/Lucas Jackson (UNITED STATES - Tags: FOOD SOCIETY) 

Girls participate in the Thanakha (cream) grinding competition during Myanmar's new year water festival in Yangon April 12, 2010. Thanakha, a traditional powder paste made from wood, is usually used on the face as a cosmetic facial cream. Thanakha is offered to the Buddha during the water festival. REUTERS/Soe Zeya Tun (MYANMAR - Tags: SOCIETY) 

People prepare to grind cassava roots in Bingerville, near Abidjan, June 24, 2008. REUTERS/ Thierry Gouegnon (IVORY COAST) 

Workers pack coffee at La Majada coffee cooperative in Sonsonate, El Salvador, March 26, 2008. Meaning "a group of people", La Majada owns two large mills and employs over 580 workers, most of whom are small-holder producers. The cooperative takes pride for its quality coffee as well as its commitment to social projects. Picture taken March 26, 2008. REUTERS/Luis Galdamez (EL SALVADOR) 

Cheesemaker David Clarke (R) and his assistant David Shevell make Red Leicester cheese at Sparkenhoe Farm in Upton, central England October 8, 2007. Red Leicester cheese had not been made in Leicestershire since 1956 until Clarke started producing his traditional, unpasteurised cloth-bound cheese using milk from his 150 pedigree Holstein Friesian cows. REUTERS/Darren Staples (BRITAIN) 

Workers remove electoral posters at the Palais Royal in Rabat September 9, 2007. Morocco held parliamentary elections on Friday. The message on the wall reads, "Parliamentary elections on September 7 in Chellah-Rabat district". REUTERS/Rafael Marchante (MOROCCO) 

A man removes beewax from a hive in a bee farm in Falluja, 50 km (30 miles) west of Baghdad, August 31, 2007. Picture taken on August 31, 2007. REUTERS/Mohanned Faisal (IRAQ)