CREATE TABLE "round_of_16" (
  "team_num1" text,
  "points" text,
  "team_num2" text,
  "1st_leg" text,
  "2nd_leg" text
);

Question: What is 1st Leg, when Team #2 is "Emelec"?
SQL: SELECT "1st_leg" FROM "round_of_16" WHERE "team_num2"='emelec';

Question: What is 1st Leg, when Team #1 is "San Lorenzo"?
SQL: SELECT "1st_leg" FROM "round_of_16" WHERE "team_num1"='san lorenzo';