Question: On what type of surface did they play on 13 February 1994?
SQL: SELECT "Surface" FROM "2-1729072-2" WHERE "Date" = '13 February 1994';

Question: In which tournament was Silke Meier the opponent in the final?
SQL: SELECT "Tournament" FROM "2-1729072-2" WHERE "Opponent in the final" = 'Silke Meier';