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LONDON, UNITED KINGDOM - MARCH 21 : Kevin Nolan of West Ham appeals for a penalty during the Barclays Premier League match between West Ham United and Sunderland AFC at The Boleyn Ground on March 21, 2015 in London, England. (Photo by Ian Horrocks/Sunderland AFC via Getty Images)

LONDON, UNITED KINGDOM - MARCH 21 : Kevin Nolan of West Ham appeals for a penalty during the Barclays Premier League match between West Ham United and Sunderland AFC at The Boleyn Ground on March 21, 2015 in London, England. (Photo by Ian Horrocks/Sunderland AFC via Getty Images)