Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_21091162_1 (date VARCHAR, opponent VARCHAR)
### Question:
How many dates have boston college as the opponent?
### Answer:
SELECT COUNT(date) FROM table_21091162_1 WHERE opponent = "Boston College"