def get_offer_additional_assets(html_parser):
    """
    This method returns information about the apartment's additional assets.

    :param html_parser: a BeautifulSoup object
    :rtype: list(string)
    :return: A list containing the additional assets
    """
    additional_group_assets = html_parser.findAll(class_="dotted-list")
    assets = []
    if additional_group_assets:
        assets = [
            asset.strip()
            for group in additional_group_assets
            for asset in group.text.split('\n')
            if asset
        ]
    return assets