Question: Nike Mercurial Vapor is endorsed by the Brazilian footballer who plays what position for Liverpool?

Context paragraphs:
Zé Eduardo (footballer, born 1991): José Eduardo de Araújo or simply Zé Eduardo (born 16 August 1991), is a Brazilian footballer who plays as a defensive midfielder.  He can also play at full-back or on either wing, but sees central midfield as his strongest position.

Caue Fernandes: Caue Fernandes Silveira (born July 31, 1988 in Santana do Livramento) is a Brazilian footballer currently playing for Liverpool on loan from Club Nacional de Football of the Uruguayan Primera División.

Guilherme Choco: Guilherme de Souza (born 18 January 1990, in Mogi das Cruzes, Brazil), commonly known as Choco, is a Brazilian footballer who plays for A Lyga club Sūduva Marijampolė.  He normally plays in a right back position, but can also play on the right side of midfield.

Rômulo (footballer, born 1990): Rômulo Borges Monteiro (born 19 September 1990), known simply as Rômulo, is a Brazilian footballer who plays as a defensive midfielder.  He currently plays for Brazilian Série A club Flamengo.

Nike Mercurial Vapor: The Mercurial Vapor is a football boot manufactured by Nike.  The boot is known for being lightweight.  Because of this, the boot is endorsed by many players for whom speed is part of their game, notably wingers or strikers, such as Cristiano Ronaldo, Franck Ribéry, Luiz Adriano, Zlatan Ibrahimović, Didier Drogba, Jesús Navas, Luka Modrić, Arturo Vidal, Douglas Costa, Xherdan Shaqiri, Raheem Sterling, Stephan El Shaarawy, Eden Hazard, Alexis Sánchez, Carlos Bacca and Philippe Coutinho, among others.

Philippe Coutinho: Philippe Coutinho Correia (] ; born 12 June 1992) is a Brazilian professional footballer who plays as an attacking midfielder for Premier League club Liverpool and the Brazil national team.

Ewerthon: Ewerthon Henrique de Souza (born 10 June 1981 in São Paulo, Brazil) is a retired Brazilian footballer who last played for Clube Atlético Sorocaba.  His position was forward or winger.  He was best known for his pace, trickery and long shots, and has played for clubs in Brazil, Germany, Spain, Russia and Qatar.  Ewerthon was selected for the Brazilian national team for the 2001 Copa América and the 2003 CONCACAF Gold Cup, finishing as runner-up in the latter.

Carlos Alberto dos Santos Gomes: Carlos Alberto (born 22 October 1980 in Boquim, Brazil), full name Carlos Alberto dos Santos Gomes, is a Brazilian footballer who plays for Boavista Sport Club at the left defender position.

Fernando Oliveira: Fernando Oliveira De Avila (born in Pelotas, Brazil, May 11, 1984) is a Brazilian footballer.  He plays in the forward position and his most recent team is the Peruvian Primera División side Ayacucho FC.

Ronaldo V-Football: Ronaldo V-Football, intended to be known as Ronaldo V-Soccer in the United States until it was cancelled, is a video game developed by PAM Development and published by Infogrames.  It was originally released in 2000 for the PlayStation and Game Boy Color.  The game was endorsed by the Brazilian footballer Ronaldo, at the time one of the highest-renowned players in the world.  It is the only game exclusively endorsed by him.

Supporting paragraphs: Nike Mercurial Vapor Philippe Coutinho
Answer: midfielder