text: lookup_str='', metadata={'source': 'https://www.espn.com/'}, lookup_index=0),     Document(page_content='GoogleSearch Images Maps Play YouTube News Gmail Drive More Â»Web History | Settings | Sign in\xa0Advanced searchAdvertisingBusiness SolutionsAbout GoogleÂ© 2023 - Privacy - Terms   ', lookup_str='', metadata={'source': 'https://google.com'}, lookup_index=0)]Loading a xml file, or using a different BeautifulSoup parserâ€‹You can also look at SitemapLoader for an example of how to load a sitemap file, which is an example of using this feature.loader = WebBaseLoader(    "https://www.govinfo.gov/content/pkg/CFR-2018-title10-vol3/xml/CFR-2018-title10-vol3-sec431-86.xml")loader.default_parser = "xml"docs = loader.load()docs    [Document(page_content='\n\n10\nEnergy\n3\n2018-01-01\n2018-01-01\nfalse\nUniform test method for the measurement of energy efficiency of commercial packaged boilers.\nÃ‚Â§ 431.86\nSection Ã‚Â§ 431.86\n\nEnergy\nDEPARTMENT OF ENERGY\nENERGY CONSERVATION\nENERGY EFFICIENCY PROGRAM FOR CERTAIN COMMERCIAL AND INDUSTRIAL EQUIPMENT\nCommercial Packaged Boilers\nTest Procedures\n\n\n\n\nÂ§\u2009431.86\nUniform test method for the measurement of energy efficiency of commercial packaged boilers.\n(a) Scope. This section provides test procedures, pursuant to the Energy Policy and Conservation Act (EPCA), as amended, which must be followed for measuring the combustion efficiency and/or thermal efficiency of a gas- or oil-fired commercial packaged boiler.\n(b) Testing and Calculations. Determine the thermal efficiency or combustion efficiency of commercial packaged boilers by conducting