question: If there is one human feeding birds in every image.
#1 return human 
#2 return birds 
#3 return #1 feeding #2 
#4 return images of #3 
#5 return number of  #3 for each  #4 
#6 return #4 where  #5 is equal to  one 
#7 return number of  #6 
#8 return images 
#9 return number of  #8 
#10 return if  #7 is equal to  #9