A masked man awaits the start of the parade of the 9th International Festival of the Iberian Mask in Lisbon May 10, 2014. The festival runs until next Sunday and about 450 masked people from Spain, Portugal and Italy are participating. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY) 

A member of the "Los Jurrus de Alija de Infantado" folk group poses for a portrait before the parade of the 9th International Festival of the Iberian Mask in Lisbon May 10, 2014. The festival runs until next Sunday and about 450 masked people from Spain, Portugal and Italy are participating. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY) 

A member of the "Los Jurrus de Alija de Infantado" folk group poses for a portrait before the parade of the 9th International Festival of the Iberian Mask in Lisbon May 10, 2014. The festival runs until next Sunday and about 450 masked people from Spain, Portugal and Italy are participating. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY) 

A member of the "Los Jurrus de Alija de Infantado" folk group poses for a portrait before the parade of the 9th International Festival of the Iberian Mask in Lisbon May 10, 2014. The festival runs until next Sunday and about 450 masked people from Spain, Portugal and Italy are participating. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY) 

A member of the "Los Jurrus de Alija de Infantado" folk group prepares before the parade of the 9th International Festival of the Iberian Mask in Lisbon May 10, 2014. The festival runs until next Sunday and about 450 masked people from Spain, Portugal and Italy are participating. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY) 

A mask is seen before the parade of the 9th International Festival of the Iberian Mask in Lisbon May 10, 2014. The festival runs until next Sunday and about 450 masked people from Spain, Portugal and Italy are participating. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY TPX IMAGES OF THE DAY) 

Masked people dress before the parade of the 9th International Festival of the Iberian Mask in Lisbon May 10, 2014. The festival runs until next Sunday and about 450 masked people from Spain, Portugal and Italy are participating. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY) 

Masked people dress before the 9th International Festival of the Iberian Mask parade in Lisbon May 10, 2014. The festival runs until next Sunday and about 450 masked people from Spain, Portugal and Italy are participating. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY) 

A masked child plays at a column before the parade of the 9th International Festival of the Iberian Mask in Lisbon May 10, 2014. The festival runs until on next Sunday and particle 450 masked people from Spain, Portugal and Italy. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY) 

Masked people await the start of the parade of the 9th International Festival of the Iberian Mask in Lisbon May 10, 2014. The festival runs until next Sunday and about 450 masked people from Spain, Portugal and Italy are participating. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY) 

A member of the Los Sidros company from Spain rests during the 9th International Festival of the Iberian Mask in Lisbon May 9, 2014. The festival runs until next Sunday and about 450 masked people from Spain, Portugal and Italy are participating. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY) 

Masked people await the start of the parade of the 9th International Festival of the Iberian Mask in Lisbon May 10, 2014. The festival runs until next Sunday and about 450 masked people from Spain, Portugal and Italy are participating. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY) 

A participant performs during the parade of the 9th International Festival of the Iberian Mask in Lisbon May 10, 2014. The festival runs until next Sunday and about 450 masked people from Spain, Portugal and Italy are participating. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY) 

Participants perform during the parade of the 9th International Festival of the Iberian Mask in Lisbon May 10, 2014. The festival runs until next Sunday and about 450 masked people from Spain, Portugal and Italy are participating. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY)