What is the 1st leg that has a Rc Cannes Team 1?
CREATE TABLE "playoffs_12" (
  "team_1" text,
  "agg" text,
  "team_2" text,
  "1st_leg" text,
  "2nd_leg" text
);
SELECT "1st_leg" FROM "playoffs_12" WHERE "team_1"='rc cannes';