Question: What is the birthdate of this English former footballer who played as a striker and who played for the 2012-13 Sheffield United F.C. season?

Related documents: [0]  [DOC] David Barry Kitson (born 21 January 1980) is an English former footballer who played as a striker. He has made 420 appearances in the Premier League and Football League, including 135 for Reading. [END] 
[1]  [DOC] Sheffield United Football Club participated in League One, the third level of English football in 2012–13, after having failed to win promotion, losing in the previous season's play-off final. Danny Wilson remained in charge for a second season and the club continued to reduce costs as they sought to adapt to life at the third level of English football. Many of the players involved in the previous season were either sold or released, while the likes of Nick Blackman, Tony McMahon, Shaun Miller and Dave Kitson were signed to replace them. [END]  
Answer: 21 January 1980
21 January 1980