code: def entities(self):
      
      start = 0
      end = 0
      prev_tag = u'O'
      chunks = []
      for i, (w, tag) in enumerate(self.ne_chunker.annotate(self.words)):
        if tag != prev_tag:
          if prev_tag == u'O':
            start = i
          else:
            chunks.append(Chunk(self.words[start: i], start, i, tag=prev_tag,
                                parent=self))
          prev_tag = tag
      if tag != u'O':
        chunks.append(Chunk(self.words[start: i+1], start, i+1, tag=tag,
                            parent=self))
      return chunks
docs: Returns a list of entities for this blob.