If a baboob is laying on his back in the brach of a tree
return baboob ;return back of #1 ;return #1 that is laying on #2 ;return brach of a  tree ;return #3 that is in  #4 ;return number of  #5 ;return if  #6 is at least one
['select', 'project', 'filter', 'select', 'filter', 'aggregate', 'boolean']