If there are two otters floating in the water next to each other on their backs
return otters ;return the  water ;return #1 floating in  #2 ;return backs of #3 ;return #3 on #4 ;return #5 that are next to  each other ;return number of  #6 ;return if  #7 is equal to  two
['select', 'select', 'filter', 'project', 'filter', 'filter', 'aggregate', 'boolean']