CREATE TABLE table_31900 ("Outcome" CLOB, "Date" CLOB, "Surface" CLOB, "Partner" CLOB, "Opponents" CLOB, "Score" CLOB)

What was the surface for the game that had a partner of vania king?
SELECT "Surface" FROM table_31900 WHERE "Partner" = 'vania king'
SELECT "Surface" FROM "table_31900" WHERE "Partner" = 'vania king'