Complex sentence: He left after spending three and a half years at Schalke and joined Beşiktaş J.K. on 2 February 2009, signing a contract which lasted until 2012.
Split into simpler sentences: He left after spending three and a half years at Schalke and joined Beşiktaş J.K. on 2 February 2009. The player signed a contract which lasted until 2012.