CREATE TABLE "past_winners" (
  "year" real,
  "men_s_singles" text,
  "women_s_singles" text,
  "men_s_doubles" text,
  "women_s_doubles" text,
  "mixed_doubles" text
);

Question: How many years were there a men's double of györgy vörös gábor petrovits and a men's single of györgy vörös?
SQL: SELECT SUM("year") FROM "past_winners" WHERE "men_s_doubles"='györgy vörös gábor petrovits' AND "men_s_singles"='györgy vörös';