What is Time, when Jockey is John Velazquez, and when Trainer is Todd A. Pletcher?
CREATE TABLE "winners_since_2000" (
  "year" real,
  "winner" text,
  "jockey" text,
  "trainer" text,
  "owner" text,
  "time" text
);
SELECT "time" FROM "winners_since_2000" WHERE "jockey"='john velazquez' AND "trainer"='todd a. pletcher';