CREATE TABLE "first_stage" (
  "team_num1" text,
  "points" text,
  "team_num2" text,
  "1st_leg" text,
  "2nd_leg" text
);

Question: What is the 2nd leg of goiás team 2?
SQL: SELECT "2nd_leg" FROM "first_stage" WHERE "team_num2"='goiás';

Question: What is the 2nd leg of emelec team 2?
SQL: SELECT "2nd_leg" FROM "first_stage" WHERE "team_num2"='emelec';

Question: What is the 2nd leg with ldu quito as team 1?
SQL: SELECT "2nd_leg" FROM "first_stage" WHERE "team_num1"='ldu quito';