def unescape_html(chatbot, statement):
    """
    Convert escaped html characters into unescaped html characters.
    For example: "&lt;b&gt;" becomes "<b>".
    """
    import sys
    if sys.version_info[0] < 3:
        from HTMLParser import HTMLParser
        html = HTMLParser()
    else:
        import html
    statement.text = html.unescape(statement.text)
    return statement
