What is the first name of students enrolled in class ACCT-211 and got grade C?
return students ;return classes #1 are  enrolled in ;return #1 where #2 is  ACCT-211 ;return grade of  #3 ;return #1 where #4 is  C ;return first names of  #5
['select', 'project', 'comparative', 'project', 'comparative', 'project']