Question: Which Italian amateur boxer beat Tumba Silva in the 2012 Olympics?

Context paragraphs:
Tumba Silva: Tumba Silva is an Angolan boxer.  At the 2012 Summer Olympics, he competed in the Men's heavyweight, but lost in a walkover to Clemente Russo in the first round after missing the weigh-in.

Vincenzo Picardi: Vincenzo Picardi (born October 20, 1983 in Casoria) is an Italian amateur boxer best known for winning a bronze medal in the flyweight division both at the 2007 World Amateur Boxing Championships in Chicago and at the 2008 Olympics.

Clemente Russo: Clemente Russo (born 27 July 1982) is an Italian amateur boxer best known for winning Gold at the 2007 and 2013 World Amateur Boxing Championships at heavyweight (201 lbs limit).  He currently boxes for the Italia Thunder team in the World Series of Boxing league.  He has also signed up for the new AIBA professional league, the APB, which will launch in autumn 2013.

Benson Gicharu: Benson Gicharu Njangiru (born May 3, 1985) is a Kenyan amateur boxer who won silver at the 2010 Commonwealth Games in Delhi (at flyweight), a bronze medal at the 2014 Commonwealth Games (at bantamweight) and qualified for the 2012 Olympics (at flyweight).  His occupation is police officer.

Gaetano Curcetti: Gaetano Curcetti (born 29 June 1947) is a retired Italian amateur boxer.  He competed in the 1972 Summer Olympics, but was eliminated in the first bout.  His elder brother Paolo was also an Olympic boxer.

Carlos Quipo: Carlos Quipo Pilataxi( b. May 17, 1990) is an Ecuador amateur boxer who competed at the 2012 Olympics at light flyweight.

Vincenzo Mangiacapre: Vincenzo Mangiacapre (born 17 January 1989 in Marcianise) is an Italian light welterweight amateur boxer, who won Bronze at the 2011 World Amateur Boxing Championships and the 2012 Olympics.

Sven Paris: Sven Paris (born December 17, 1980) is an Italian amateur boxer who competed in the light welterweight division at the 2000 Summer Olympics.

Anvar Yunusov: Anvar Yunusov (born February 1, 1987, Dushanbe) is an amateur boxer from Tajikistan best known from giving Asian Games winner Violito Payla his first ever stoppage defeat at the 2007 World Championships.  He has also qualified for the 2008 and 2012 Olympics and 2016 Olympics.

Alessia Mesiano: Alessia Mesiano (born 7 December 1991) is an Italian amateur boxer, 2016 AIBA world champion in the 57 kg.

Supporting paragraphs: Tumba Silva Clemente Russo
Answer: Clemente Russo