def get_attrib_tokens(self, a="<STR_LIT>"):
return self.__getattribute__(a)<EOL>
Get the tokens of sentence attribute *a*.

        Intuitively, like calling::

            implicit_span.a


        :param a: The attribute to get tokens for.
        :type a: str
        :return: The tokens of sentence attribute defined by *a* for the span.
        :rtype: list