question: If no humans are in sight in one of the images of hounds.
#1 return hounds 
#2 return humans 
#3 return images 
#4 return number of  #1 for each  #3 
#5 return #3 where  #4 is at least one 
#6 return number of  #2 for each  #5 
#7 return #5 where  #6 is equal to  zero 
#8 return number of  #7 
#9 return if  #8 is equal to  one