question: If one image contains no more than 10 zebra, and the other image includes a mass of zebra too numerous to count, but no other large animals that are clearly visible.
#1 return one image  
#2 return zebras in  #1 
#3 return number of  #2 
#4 return if  #3 is at most 10 
#5 return other image  
#6 return mass of zebra in  #5 
#7 return if  #6 is too numerous to  count 
#8 return animals in  #5 
#9 return #8 that are large 
#10 return #9 besides  #6 
#11 return number of  #10 
#12 return if  #11 is equal to  zero 
#13 return if  both  #7 and #12 are true 
#14 return if  both  #4 and #13 are true