CREATE TABLE "winners_of_the_breeders_cup_marathon_sin" (
  "year" real,
  "winner" text,
  "jockey" text,
  "trainer" text,
  "owner" text,
  "time" text,
  "purse" text
);

Question: What was the purse when the trainer was Aidan O'Brien?
SQL: SELECT "purse" FROM "winners_of_the_breeders_cup_marathon_sin" WHERE "trainer"='aidan o''brien';

Question: What is the time for when cornelio velasquez was the jockey?
SQL: SELECT "time" FROM "winners_of_the_breeders_cup_marathon_sin" WHERE "jockey"='cornelio velasquez';

Question: Who was the jockey when the owner was Richard Pegum?
SQL: SELECT "jockey" FROM "winners_of_the_breeders_cup_marathon_sin" WHERE "owner"='richard pegum';

Question: What is the purse when Aidan O'brien was the trainer?
SQL: SELECT "purse" FROM "winners_of_the_breeders_cup_marathon_sin" WHERE "trainer"='aidan o''brien';

Question: What is the purse for the year earlier than 2013 and muhannak was the winner?
SQL: SELECT "purse" FROM "winners_of_the_breeders_cup_marathon_sin" WHERE "year"<2013 AND "winner"='muhannak';

Question: Who was the trainer in 2013?
SQL: SELECT "trainer" FROM "winners_of_the_breeders_cup_marathon_sin" WHERE "year"=2013;