Question: Right before the start of the 2012-2013 season, who was the Brazilian central defender the FC Bayern Munich signed?
Sentence (from "2012–13 FC Bayern Munich season"): The 2012–13 FC Bayern Munich season was the 114th season in the club's history and the 48th consecutive season in the top flight of German football, the Bundesliga, since the promotion of the team from the Regionalliga Süd in 1965.
Relevant evidence: No