CREATE TABLE "women_s_doubles_6_finals_5_titles_1_runn" (
  "outcome" text,
  "year" real,
  "championship" text,
  "surface" text,
  "partner" text,
  "opponents" text,
  "score" text
);

Question: What was the surface during wimbledon in 1974?
SQL: SELECT "surface" FROM "women_s_doubles_6_finals_5_titles_1_runn" WHERE "championship"='Wimbledon' AND "year"=1974;