Which class has a frequency of 91.9 fm?
CREATE TABLE table_name_31 (class VARCHAR, frequency VARCHAR)
SELECT class FROM table_name_31 WHERE frequency = "91.9 fm"
### Context: CREATE TABLE table_name_31 (class VARCHAR, frequency VARCHAR) ### Question: Which class has a frequency of 91.9 fm? ### Answer: SELECT class FROM table_name_31 WHERE frequency = "91.9 fm"