What class was the 2nd - portillo?
CREATE TABLE "career_results" (
  "result" text,
  "date" text,
  "race" text,
  "venue" text,
  "distance" text,
  "class" text,
  "weight_kg" text,
  "time" text,
  "jockey" text,
  "odds" text,
  "winner_2nd" text
);
SELECT "class" FROM "career_results" WHERE "winner_2nd"='2nd - Portillo';