question: If in at least one image there is a single bus facing right forward.
#1 return bus 
#2 return #1 that is facing right forward 
#3 return images 
#4 return number of  #2 for each  #3 
#5 return #3 where  #4 is equal to  one 
#6 return number of  #5 
#7 return if  #6 is at least one