what is the score in the 1st leg where the contest and round was in europa league play off round
CREATE TABLE "norwegian_clubs_performance_in_europe" (
  "team" text,
  "contest_and_round" text,
  "opponent" text,
  "1st_leg_score" text,
  "2nd_leg_score" text,
  "aggregate_score" text
);
SELECT COUNT("1st_leg_score") FROM "norwegian_clubs_performance_in_europe" WHERE "contest_and_round"='Europa League Play Off Round';