Which Venue has a Notes of heptathlon, and a Year of 1991?
CREATE TABLE table_name_20 (
    venue VARCHAR,
    notes VARCHAR,
    year VARCHAR
)
SELECT venue FROM table_name_20 WHERE notes = "heptathlon" AND year = 1991
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: Which Venue has a Notes of heptathlon, and a Year of 1991? ### Input: CREATE TABLE table_name_20 (
    venue VARCHAR,
    notes VARCHAR,
    year VARCHAR
) ### Response: SELECT venue FROM table_name_20 WHERE notes = "heptathlon" AND year = 1991