CREATE TABLE "2013_fifa_u_20_world_cup" (
  "date" text,
  "time_cest" real,
  "team_num1" text,
  "res" text,
  "team_num2" text,
  "round" text,
  "attendance" real
);

Question: What id the team with a smaller Time than 18?
SQL: SELECT "team_num1" FROM "2013_fifa_u_20_world_cup" WHERE "time_cest"<18;