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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def handle_endtag(self, tag):
 """ Called by HTMLParser.feed when an end tag is found. """

        if tag in PARENT_ELEMENTS:
            self.current_parent_element['tag'] = ''
            self.current_parent_element['attrs'] = ''

        if tag == 'li':
            self.parsing_li = True
        if tag != 'br':
            self.cleaned_html += '</{}>'.format(tag)