CREATE TABLE "doubles_runner_up" (
  "date" text,
  "tournament" text,
  "surface" text,
  "partner" text,
  "opponents_in_the_final" text,
  "score" text
);

Question: Which surface had Yew-Ming Si as a partner?
SQL: SELECT "surface" FROM "doubles_runner_up" WHERE "partner"='yew-ming si';