Task: Question Generation
Input (English): #1 return reviewers 
#2 return 4 stars that  #1 have given 
#3 return number of  #2 for each #1 
#4 return #1 where #3 is  at least one 
#5 return #1 besides #4 
#6 return the  ids of #5
Output (English): What are the ids of all reviewers who have not given 4 stars at least once?