def get_floor_for_offer(item, *args, **kwargs):
    """ Parse information about number of the floor

    :param item: Tag html found by finder in html markup
    :return: Number of the floor or None if information not given
    :rtype: int, None
    """
    if not item:
        return None
    floor = item.find_next_sibling().text
    return int(floor) if floor != 'Parter' else 0