CREATE TABLE table_68456 ("Outcome" TEXT, "Date" TEXT, "Surface" TEXT, "Opponent" TEXT, "Score" TEXT)

What is the surface of the match when the outcome was runner-up, and a Score of julia g rges polona hercog?
SELECT "Surface" FROM table_68456 WHERE "Outcome" = 'runner-up' AND "Score" = 'julia görges polona hercog'
SELECT "Surface" FROM "table_68456" WHERE "Outcome" = 'runner-up' AND "Score" = 'julia görges polona hercog'