How many touchdowns are there when there were 0 extra points and Hal Weeks had left halfback?
CREATE TABLE table_name_71 (
    touchdowns VARCHAR,
    player VARCHAR,
    extra_points VARCHAR,
    position VARCHAR
)
SELECT touchdowns FROM table_name_71 WHERE extra_points = 0 AND position = "left halfback" AND player = "hal weeks"
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: How many touchdowns are there when there were 0 extra points and Hal Weeks had left halfback? ### Input: CREATE TABLE table_name_71 (
    touchdowns VARCHAR,
    player VARCHAR,
    extra_points VARCHAR,
    position VARCHAR
) ### Response: SELECT touchdowns FROM table_name_71 WHERE extra_points = 0 AND position = "left halfback" AND player = "hal weeks"