def clean_content(content):
    """\
    Removes paragraph numbers, section delimiters, xxxx etc. from the content.
    
    This function can be used to clean-up the cable's content before it
    is processed by NLP tools or to create a search engine index.
    
    `content`
        The content of the cable.
    """
    for pattern, subst in _CLEAN_PATTERNS:
        content = pattern.sub(subst, content)
    return content
\
    Removes paragraph numbers, section delimiters, xxxx etc. from the content.
    
    This function can be used to clean-up the cable's content before it
    is processed by NLP tools or to create a search engine index.
    
    `content`
        The content of the cable.