CREATE TABLE table_name_18 (fastest_lap VARCHAR, date VARCHAR, circuit VARCHAR)

What is Fastest Lap, when Date is Leeds, Alabama, and when Circuit is April 19?
SELECT fastest_lap FROM table_name_18 WHERE date = "leeds, alabama" AND circuit = "april 19"
SELECT "fastest_lap" FROM "table_name_18" WHERE "april 19" = "circuit" AND "date" = "leeds, alabama"