question: If all of the birds are in or near the water.
#1 return birds 
#2 return the  water 
#3 return #1 in  #2 
#4 return #1 near #2 
#5 return #3 , #4 
#6 return number of  #5 
#7 return number of  #1 
#8 return if  #6 is equal to  #7