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

Question: When they played San Lorenzo, what was the score of the second leg?
SQL: SELECT "2nd_leg" FROM "round_of_16" WHERE "team_num1"='San Lorenzo';

Question: When they played Universidad de Chile, what was the score of the first leg?
SQL: SELECT COUNT("1st_leg") FROM "round_of_16" WHERE "team_num2"='Universidad de Chile';

Question: Who played San Lorenzo?
SQL: SELECT "team_num2" FROM "round_of_16" WHERE "team_num1"='San Lorenzo';

Question: Who played River Plate?
SQL: SELECT "team_num2" FROM "round_of_16" WHERE "team_num1"='River Plate';