Table: bwf_super_series_2009
Columns: tour
mens_singles
womens_singles
mens_doubles
womens_doubles
mixed_doubles

Question: when womens singles is wang yihan and tour is french super series, what were the men's singles?
SQL: SELECT "mens_singles" FROM bwf_super_series_2009 WHERE "womens_singles" = 'Wang Yihan' AND "tour" = 'French Super Series'

Question: when mixed doubles is zheng bo ma jin and womens singles is wang yihan, what was the tour?
SQL: SELECT "tour" FROM bwf_super_series_2009 WHERE "mixed_doubles" = 'Zheng Bo Ma Jin' AND "womens_singles" = 'Wang Yihan'