Question: What athlete born 7 April 1983 was added to Bayern Munich before the beginning of the 2007–08 season?
Sentence (from "2007–08 FC Bayern Munich season"): The season started with Bayern winning the DFB-Ligapokal, followed by a shootout win in the DFB-Pokal against Wacker Burghausen on 6 August 2007.
Relevant evidence: No