question: If in at least one image there is a sea lion swimming alone with no other mammals present.
#1 return sea lion 
#2 return #1 swimming alone 
#3 return images of  #2 
#4 return mammals in  #3 
#5 return number of #4 for each #3 
#6 return #3 where #5 is  equal to one 
#7 return number of #6 
#8 return if  #7 is  at least one