What is Team 1 where Team 2 is al tahrir?
CREATE TABLE "first_round_1_16_finals" (
  "team_1" text,
  "agg" text,
  "team_2" text,
  "1st_leg" text,
  "2nd_leg" text
);
SELECT "team_1" FROM "first_round_1_16_finals" WHERE "team_2"='al tahrir';