Table: pavlina_nola_playoffs
Columns: edition
round
date
surface
opponent
result

Question: Which Round has kim eun-ha as an Opponent?
SQL: SELECT "round" FROM pavlina_nola_playoffs 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 pavlina_nola_playoffs WHERE "surface" = 'clay' AND "opponent" = 'park sung-hee'