Task: Question Generation
Input (English): #1 return crabs 
#2 return images 
#3 return number of  #1 for each  #2 
#4 return #2 where  #3 is equal to  one 
#5 return number of  #2 
#6 return number of  #4 
#7 return if  #5 is equal to  #6
Output (English): If each image includes only a single crab.