What's the value for race 4 for driver kevin heffernan?
CREATE TABLE table_46391 (
    "Driver" text,
    "Race 1" text,
    "Race 2" text,
    "Race 3" text,
    "Race 4" text
)
SELECT "Race 4" FROM table_46391 WHERE "Driver" = 'kevin heffernan'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What's the value for race 4 for driver kevin heffernan? ### Input: CREATE TABLE table_46391 (
    "Driver" text,
    "Race 1" text,
    "Race 2" text,
    "Race 3" text,
    "Race 4" text
) ### Response: SELECT "Race 4" FROM table_46391 WHERE "Driver" = 'kevin heffernan'