What is the winner or 2nd of the race with a 2nd pos'n and a weight lighter than 8.1?
CREATE TABLE "1929_30_season_as_a_three_year_old" (
  "result" text,
  "race" text,
  "distance" text,
  "weight" real,
  "winner_or_2nd" text,
  "pos_n" text
);
SELECT "winner_or_2nd" FROM "1929_30_season_as_a_three_year_old" WHERE "pos_n"='2nd' AND "weight"<8.1;