query: SELECT count(*) FROM architect WHERE id NOT IN ( SELECT architect_id FROM mill WHERE built_year  <  1850 );
question: How many architects one evern't build no mill no year 1850?
query_toks: SELECT count ( * ) FROM architect WHERE id NOT IN ( SELECT architect_id FROM mill WHERE built_year < 1850 ) ;
query_toks_no_value: select count ( * ) from architect where id not in ( select architect_id from mill where built_year < value )
question_toks: How many architects one evern't build no mill no year 1850?