Load OpenCorpora corpus.

    The ``source`` can be any of the following:

    - a file name/path
    - a file object
    - a file-like object
    - a URL using the HTTP or FTP protocol

def load(source):
    """
    Load OpenCorpora corpus.

    The ``source`` can be any of the following:

    - a file name/path
    - a file object
    - a file-like object
    - a URL using the HTTP or FTP protocol

    """
    parser = get_xml_parser()
    return etree.parse(source, parser=parser).getroot()