CREATE TABLE table_1360997_3 (weight__kg_ VARCHAR(255), winner_2nd VARCHAR(255), venue VARCHAR(255))
How many entries are there for weight when the winner is 1st - defier and venue is randwick?
    
SQL: SELECT COUNT(weight__kg_) FROM table_1360997_3 WHERE winner_2nd = "1st - Defier" AND venue = "Randwick"