query: SELECT count(*) FROM customers WHERE customer_id NOT IN ( SELECT customer_id FROM customer_events )
question: How many customer did ain't em event?
query_toks: SELECT count ( * ) FROM customers WHERE customer_id NOT IN ( SELECT customer_id FROM customer_events )
query_toks_no_value: select count ( * ) from customers where customer_id not in ( select customer_id from customer_events )
question_toks: How many customer did ain't em event?