commentable_type: 'Press', 'Review', 'Startup', 'StartupRole', 'StatusUpdate'

def get_comments(self, commentable_type, id_):
    """
    commentable_type: 'Press', 'Review', 'Startup', 'StartupRole', 'StatusUpdate'
    """
    return _get_request(_COM.format(c_api=_C_API_BEGINNING,
                                            ct=commentable_type,
                                            id_=id_,
                                            api=_API_VERSION,
                                            at=self.access_token))