How many dates have boston college as the opponent?
CREATE TABLE table_21091162_1 (date VARCHAR, opponent VARCHAR)
SELECT COUNT(date) FROM table_21091162_1 WHERE opponent = "Boston College"
### 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"