If team two is San Lorenzo, how many were on team one?
CREATE TABLE "round_of_16" (
  "team_num1" text,
  "points" text,
  "team_num2" text,
  "1st_leg" text,
  "2nd_leg" text
);
SELECT COUNT("team_num1") FROM "round_of_16" WHERE "team_num2"='San Lorenzo';