Who became the champion for the 1984 Grand Prix where Marty Davis was the runner-up?
CREATE TABLE table_29295463_9 (
    champion VARCHAR,
    runner_up VARCHAR
)
SELECT champion FROM table_29295463_9 WHERE runner_up = "Marty Davis"
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: Who became the champion for the 1984 Grand Prix where Marty Davis was the runner-up? ### Input: CREATE TABLE table_29295463_9 (
    champion VARCHAR,
    runner_up VARCHAR
) ### Response: SELECT champion FROM table_29295463_9 WHERE runner_up = "Marty Davis"