If there is at least one human standing inside a boat while the boat is in the water.
return human ;return boat  ;return water ;return #2 that is in  #3 ;return #1 that is standing inside #4 ;return number of  #5 ;return if  #6 is at least one
['select', 'select', 'select', 'filter', 'filter', 'aggregate', 'boolean']