If a single crab sits on a sediment surface in the image on the right.
return crab ;return surface ;return #2 that is sediment ;return #1 on #3 ;return #4 in  right image ;return the  number of  #5 ;return if  #6 is equal to  one
['select', 'select', 'filter', 'filter', 'filter', 'aggregate', 'boolean']