CREATE TABLE "matches" (
  "date" text,
  "venue" text,
  "opponents" text,
  "score" text,
  "comp" text,
  "attendance" text
);

Question: Who was the opponent at Ullevi?
SQL: SELECT "opponents" FROM "matches" WHERE "venue"='ullevi';

Question: When was Göteborg the opponent with a score of 3-1?
SQL: SELECT "date" FROM "matches" WHERE "opponents"='göteborg' AND "score"='3-1';