def _do_word(self, word, lemma=None, type=None):
<EOL>if lemma == "<STR_LIT>" and type in ("<STR_LIT>", "<STR_LIT>"):<EOL><INDENT>lemma = "<STR_LIT>"<EOL><DEDENT>self.words.append(Word(self, word, lemma, type, index=len(self.words)))<EOL>
Adds a new Word to the sentence.
            Other Sentence._do_[tag] functions assume a new word has just been appended.