query: SELECT model_name FROM chip_model EXCEPT SELECT chip_model FROM phone WHERE Accreditation_type  =  'Full'
question: Do Find name a chip model where ain't a-used by any a phone full a accreditation a type.
query_toks: SELECT model_name FROM chip_model EXCEPT SELECT chip_model FROM phone WHERE Accreditation_type = 'Full '
query_toks_no_value: select model_name from chip_model except select chip_model from phone where accreditation_type = value
question_toks: Do Find name a chip model where ain't a-used by any a phone full a accreditation a type.