CREATE TABLE "2007_rugby_world_cup_squads" (
  "player" text,
  "position" text,
  "date_of_birth_age" text,
  "caps" real,
  "club_province" text
);

Question: What club/province for the player with over 18 caps and plays the fly-half?
SQL: SELECT "club_province" FROM "2007_rugby_world_cup_squads" WHERE "caps">18 AND "position"='fly-half';