code: def get_docs(self, vocab):
          
          for string in self.strings:
              vocab[string]
          orth_col = self.attrs.index(ORTH)
          for tokens, spaces in zip(self.tokens, self.spaces):
              words = [vocab.strings[orth] for orth in tokens[:, orth_col]]
              doc = Doc(vocab, words=words, spaces=spaces)
              doc = doc.from_array(self.attrs, tokens)
              yield doc
docs: Recover Doc objects from the annotations, using the given vocab.