If one chimp has a wide open mouth showing its front row of teeth.
return chimp ;return mouth of #1 ;return #1 where  #2 is wide open ;return teeth of #3 ;return front row of #4 ;return #3 that is showing #5 ;return number of  #6 ;return if  #7 is equal to  one
['select', 'project', 'comparative', 'project', 'project', 'filter', 'aggregate', 'boolean']