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?

Context paragraphs:
Martin Peters: Martin Stanford Peters MBE (born 8 November 1943) is an English former footballer and manager and a member of the England team which won the 1966 FIFA World Cup as well as playing in the 1970 FIFA World Cup.  Born in Plaistow, Essex, he played club football for West Ham United, Tottenham Hotspur, Norwich City and Sheffield United.  He briefly managed Sheffield United before retiring from professional football in 1981.

Dane Whitehouse: Dane Whitehouse (born 14 October 1970) is an English former footballer who played in the Football League for Sheffield United.  Whitehouse was an accomplished left winger, who was equally comfortable filling in at left back.  He served his only club, Sheffield United, for 13 years between 1987 and 2000, making 275 appearances and scoring 50 goals.

Dave Kitson: 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.

David Wetherall: David Wetherall (born 14 March 1971) is an English former footballer who played as a central defender, finishing his playing career with Bradford City at the end of the 2007–08 season.  Born in Sheffield, he supported Sheffield Wednesday as a child, and started his playing career there.  Before he made a league appearance for Sheffield Wednesday, he transferred to Leeds United and made more than 200 appearances.  After this he joined Bradford City for a then club-record fee of £1.4 million and played every minute of every match in his first season for the club.  Relegation from the Premier League soon followed and the club went into administration in 2002 but when Stuart McCall departed for Sheffield United, Wetherall became the team captain.  Wetherall missed several games through injury in the seasons that followed and Bradford City were further relegated to League One in 2004 and then to League Two in 2007.  He played his final game in professional football on 3 May 2008 against Wycombe Wanderers.

Sheffield United F.C. Player of the Year: The Sheffield United F.C. Player of the Year is an annual award presented to players of Sheffield United on behalf of the club's fans to recognise an outstanding contribution to the previous season.  First presented in 1967 the award was organised by the Official Supporters Club and voted for by its members.  The award was officially recognised and commemorated by the club and since the late 1990s has been presented at a gala dinner.  From around 2000 the award was widened to include voting from the general fanbase and various other awards have also been presented including Young Player of the Year and Goal of the Season.

Paul Smith (footballer, born 1964): Paul Michael Smith (born 9 November 1964) is an English former footballer who played in the Football League for Sheffield United, Stockport County, Port Vale, and Lincoln City.  He was promoted out of the Third Division with Sheffield United in 1983–84, and won the Conference title with Lincoln City in 1987–88.

2012–13 Sheffield United F.C. season: 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.

2008 Galway United F.C. season: 2008 Galway United F.C. season.  This is a list of competitive matches played by Galway United F.C. in during the 2008 League of Ireland Premier Division season.  Jeff Kenna served as player-manager of Galway United F.C. during this season.  During the season there were rumours of financial troubles and the selling of the players within the squad, most notably Derek O'Brien.  Relegation also loomed on the horizon.  However, a surge of great form which saw the United reach the 2008 FAI Cup semi-finals gave the club a fighting chance of survival.  A 3–0 victory over Finn Harps in the penultimate game of the season put survival in United's own hands and their victory the following week away to UCD ensured that Galway United would be playing in the League of Ireland Premier Division in 2009.

Travis Binnion: Travis Binnion (born 10 November 1986) is an English former footballer and cricketer who played football as a defender for IFK Mariehamn in the Finnish Premier Division.  Born in Derby, England, he began his career with Sheffield United before moving to Mariehamn.  After retiring from playing through injury he is now an Under 18 coach at Sheffield United.

2012–13 Oxford United F.C. season: Oxford United F.C. season 2012–13 was the club's third season in League Two after returning from the Conference.  Oxford United had finished 9th in League Two in 2011–12 and failed to improve on this position in 2012–13.  The club's opening nine league fixtures, consisting of three wins followed by six defeats, set the tone of a campaign in which the club were never serious contenders for a playoff place and which alternated between winning and losing streaks; a case in point was the three-game run of victories at the end of the season after the possibility of promotion had disappeared, which put a somewhat flattering gloss on Oxford's final position.  They were knocked out by higher-division opposition in the early rounds of both the FA Cup and League Cup (including elimination at the hands of Sheffield United from the former competition for the second year in succession), but reached the Area Semi-final of the Football League Trophy and won the Oxfordshire Senior Cup.

Supporting paragraphs: 2012–13 Sheffield United F.C. season Dave Kitson
Answer: 21 January 1980