CREATE TABLE "round_of_16" (
  "team_1" text,
  "agg" text,
  "team_2" text,
  "1st_leg" text,
  "2nd_leg" text
);

Question: WHAT TEAM 1 HAS A 1st leg of 1–1, and a 2nd leg of 1–3?
SQL: SELECT "team_1" FROM "round_of_16" WHERE "1st_leg"='1–1' AND "2nd_leg"='1–3';

Question: WHAT IS THE 1ST LEG WITH TEAM 2 AS ATHLETIC?
SQL: SELECT "1st_leg" FROM "round_of_16" WHERE "team_2"='athletic';

Question: WHAT IS THE 2ND LEG WITH TEAM 1 OF SPORTING?
SQL: SELECT "2nd_leg" FROM "round_of_16" WHERE "team_1"='sporting';