code: def _do_pnp(self, pnp, anchor=None):
          
          if anchor or pnp and pnp.endswith("PNP"):
              if anchor is not None:
                  m = find(lambda x: x.startswith("P"), anchor)
              else:
                  m = None
              if self.pnp \
               and pnp \
               and pnp != OUTSIDE \
               and pnp.startswith("B-") is False \
               and self.words[-2].pnp is not None:
                  self.pnp[-1].append(self.words[-1])
              elif m is not None and m == self._attachment:
                  self.pnp[-1].append(self.words[-1])
              else:
                  ch = PNPChunk(self, [self.words[-1]], type="PNP")
                  self.pnp.append(ch)                
              self._attachment = m
docs: Attaches prepositional noun phrases.
              Identifies PNP's from either the PNP tag or the P-attachment tag.
              This does not determine the PP-anchor, it only groups words in a PNP chunk.