CREATE TABLE table_name_50 (class VARCHAR, jockey VARCHAR, time VARCHAR)

Which Class has a Jockey of michael kinane on 2:27.71?
SELECT class FROM table_name_50 WHERE jockey = "michael kinane" AND time = "2:27.71"
SELECT "class" FROM "table_name_50" WHERE "2:27.71" = "time" AND "jockey" = "michael kinane"