query: SELECT name FROM patient EXCEPT SELECT T1.name FROM patient AS T1 JOIN Prescribes AS T2 ON T2.Patient  =  T1.SSN JOIN Medication AS T3 ON T2.Medication  =  T3.Code WHERE T3.name  =  'Procrastin-X'
question: What are the name of patients which what ain't taking no medication of Procrastin-X.
query_toks: SELECT name FROM patient EXCEPT SELECT T1.name FROM patient AS T1 JOIN Prescribes AS T2 ON T2.Patient = T1.SSN JOIN Medication AS T3 ON T2.Medication = T3.Code WHERE T3.name = 'Procrastin-X '
query_toks_no_value: select name from patient except select t1 . name from patient as t1 join prescribes as t2 on t2 . patient = t1 . ssn join medication as t3 on t2 . medication = t3 . code where t3 . name = value
question_toks: What are the name of patients which what ain't taking no medication of Procrastin-X.