When was the opponent Poland and the match type EC -qualifier?
CREATE TABLE table_name_12 (
    date VARCHAR,
    opponenent VARCHAR,
    match_type VARCHAR
)
SELECT date FROM table_name_12 WHERE opponenent = "poland" AND match_type = "ec -qualifier"
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: When was the opponent Poland and the match type EC -qualifier? ### Input: CREATE TABLE table_name_12 (
    date VARCHAR,
    opponenent VARCHAR,
    match_type VARCHAR
) ### Response: SELECT date FROM table_name_12 WHERE opponenent = "poland" AND match_type = "ec -qualifier"