What is the height of the cornerback position?
CREATE TABLE table_20872722_1 (
    height VARCHAR,
    position VARCHAR
)
SELECT COUNT(height) FROM table_20872722_1 WHERE position = "Cornerback"
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 is the height of the cornerback position? ### Input: CREATE TABLE table_20872722_1 (
    height VARCHAR,
    position VARCHAR
) ### Response: SELECT COUNT(height) FROM table_20872722_1 WHERE position = "Cornerback"