def split(self, sep=TOKENS):
if sep != TOKENS:<EOL><INDENT>return unicode.split(self, sep)<EOL><DEDENT>if len(self) == <NUM_LIT:0>:<EOL><INDENT>return []<EOL><DEDENT>return [[[x.replace("<STR_LIT>", "<STR_LIT:/>") for x in token.split("<STR_LIT:/>")]<EOL>for token in sentence.split("<STR_LIT:U+0020>")]<EOL>for sentence in unicode.split(self, "<STR_LIT:\n>")]<EOL>
Returns a list of sentences, where each sentence is a list of tokens,
            where each token is a list of word + tags.