Question: Which Round has Kim Eun-ha as an Opponent?
SQL: SELECT "Round" FROM "2-12878201-9" WHERE "Opponent" = 'Kim Eun-ha';

Question: Which kind of Edition that has a Surface of Clay, and Park Sung-hee as an opponent?
SQL: SELECT "Edition" FROM "2-12878201-9" WHERE "Surface" = 'Clay' AND "Opponent" = 'Park Sung-hee';