query: SELECT count(*) FROM airport WHERE id NOT IN ( SELECT airport_id FROM flight WHERE pilot  =  'Thompson' );
question: How many airports haven't the pilot 'Thompson' driven no aircraft?
query_toks: SELECT count ( * ) FROM airport WHERE id NOT IN ( SELECT airport_id FROM flight WHERE pilot = 'Thompson ' ) ;
query_toks_no_value: select count ( * ) from airport where id not in ( select airport_id from flight where pilot = value )
question_toks: How many airports haven't the pilot 'Thompson' driven no aircraft?