Question: who is the the mens doubles with mens singles being jürgen koch and womens singles being sabine ploner
Schema: create table table_15002265_1 (mens_doubles varchar, mens_singles varchar, womens_singles varchar, PRIMARY KEY (mens_doubles))
SQL: select mens_doubles from table_15002265_1 where mens_singles = "jürgen koch" and womens_singles = "sabine ploner"