What distance did the winning horse run in the Summer Doldrums.
CREATE TABLE "belmont_stakes_feature_key_prep_races_li" (
  "date" text,
  "track" text,
  "race" text,
  "distance" text,
  "surface_track" text,
  "winning_horse" text,
  "winning_jockey" text
);
SELECT "distance" FROM "belmont_stakes_feature_key_prep_races_li" WHERE "winning_horse"='summer doldrums';