If a hyena has its mouth wide open with sharp teeth visible.
return hyena ;return mouth of #1 ;return #1 where  #2 is wide open ;return teeth ;return #4 that are sharp ;return #3 that has #5 ;return the  number of  #6 ;return if  #7 is at least one
['select', 'project', 'comparative', 'select', 'filter', 'filter', 'aggregate', 'boolean']