Which opponent's march was 31?
CREATE TABLE table_name_19 (
    opponent VARCHAR,
    march VARCHAR
)
SELECT opponent FROM table_name_19 WHERE march = 31
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 opponent's march was 31? ### Input: CREATE TABLE table_name_19 (
    opponent VARCHAR,
    march VARCHAR
) ### Response: SELECT opponent FROM table_name_19 WHERE march = 31