question: If the left image depicts only one adult ape, which has an arm around a younger ape.
#1 return left image 
#2 return ape  of #1 
#3 return #2 that is adult 
#4 return #2 that is younger 
#5 return arm of #3 
#6 return #3 where  #5 is around #4 
#7 return the  number of  #6 
#8 return if  #7 is equal to  one