CREATE TABLE "second_round" (
  "team_1" real,
  "agg" text,
  "team_2" text,
  "1st_leg" text,
  "2nd_leg" text
);

Question: What is the mean team 1 when the 1st leg is Albignasego (Veneto A)?
SQL: SELECT AVG("team_1") FROM "second_round" WHERE "1st_leg"='albignasego (veneto a)';