query: SELECT crs_credit ,  crs_description FROM course WHERE crs_code  =  'CIS-220'
question: How many credit course CIS-220 have, and what-all its description?
query_toks: SELECT crs_credit , crs_description FROM course WHERE crs_code = 'CIS-220 '
query_toks_no_value: select crs_credit , crs_description from course where crs_code = value
question_toks: How many credit course CIS-220 have, and what-all its description?