CREATE TABLE table_76594 ("Finish Position" TEXT, "Lengths Behind" TEXT, "Post Position" FLOAT, "Horse name" TEXT, "Trainer" TEXT, "Jockey" TEXT, "Owner" TEXT, "Post Time Odds" TEXT)

What's the lengths behind of Jockey Ramon A. Dominguez?
SELECT "Lengths Behind" FROM table_76594 WHERE "Jockey" = 'ramon a. dominguez'
SELECT "Lengths Behind" FROM "table_76594" WHERE "Jockey" = 'ramon a. dominguez'