query: SELECT name FROM manufacturers EXCEPT SELECT T2.name FROM products AS T1 JOIN manufacturers AS T2 ON T1.Manufacturer  =  T2.code WHERE T1.name  =  'DVD drive'
question: What the names of companies what which ain't make DVD no drives?
query_toks: SELECT name FROM manufacturers EXCEPT SELECT T2.name FROM products AS T1 JOIN manufacturers AS T2 ON T1.Manufacturer = T2.code WHERE T1.name = 'DVD drive '
query_toks_no_value: select name from manufacturers except select t2 . name from products as t1 join manufacturers as t2 on t1 . manufacturer = t2 . code where t1 . name = value
question_toks: What the names of companies what which ain't make DVD no drives?