parameters: (doc, light=False)
return_statement: return [POS_tree_(sent.root, light=light) for sent in doc.sents]
docstring: generate the POS tree for all sentences in a doc
docstring_summary: generate the POS tree for all sentences in a doc
docstring_tokens: generate the POS tree for all sentences in a doc
function: def parse_tree(doc, light=False):
      '''generate the POS tree for all sentences in a doc'''
      merge_ents(doc)  # merge the entities into single tokens first
      return [POS_tree_(sent.root, light=light) for sent in doc.sents]
function_tokens: def parse_tree ( doc , light = False ) : merge_ents ( doc ) # merge the entities into single tokens first return [ POS_tree_ ( sent . root , light = light ) for sent in doc . sents ]