What date did the Boston Celtics play at Richfield Coliseum?
CREATE TABLE table_name_99 (date VARCHAR, location VARCHAR)
SELECT date FROM table_name_99 WHERE location = "richfield coliseum"
### Context: CREATE TABLE table_name_99 (date VARCHAR, location VARCHAR) ### Question: What date did the Boston Celtics play at Richfield Coliseum? ### Answer: SELECT date FROM table_name_99 WHERE location = "richfield coliseum"