CREATE TABLE table_204_13 (id DECIMAL, "finished" TEXT, "post" DECIMAL, "horse" TEXT, "jockey" TEXT, "trainer" TEXT, "owner" TEXT, "time / behind" TEXT)

name of trainer of the horse that came in first in the 1997 kentucky derby
SELECT "trainer" FROM table_204_13 WHERE "finished" = 1
SELECT "trainer" FROM "table_204_13" WHERE "finished" = 1