Task: Question Decomposition
Input (English): question: What are the names of all students taking a course who received an A or C?
Output (English): #1 return students 
#2 return #1 taking a course 
#3 return #2 who  received an A 
#4 return #2 who  received a C 
#5 return #3 ,  #4 
#6 return names of  #5