Database: professional_basketball
Question: Which winning team in the 1947 playoff quarterfinals managed to score 3,513 defensive points that same year?
SQL: SELECT T2.tmID FROM series_post AS T1 INNER JOIN teams AS T2 ON T1.tmIDWinner = T2.tmID WHERE T1.year = 1947 AND T1.round = 'QF' AND T2.d_pts = 3513