If there are seals in a pool encased in glass fencing
return seals ;return pool ;return fencing ;return #3 that is glass ;return #2 encased in  #4 ;return #1 in  #5 ;return number of  #6 ;return if  #7 is at least two
['select', 'select', 'select', 'filter', 'filter', 'filter', 'aggregate', 'boolean']