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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 clean_comment_body(body):
 """Returns given comment HTML as plaintext. Converts all HTML tags and entities within 4chan comments into human-readable text equivalents. """

    body = _parser.unescape(body)
    body = re.sub(r'<a [^>]+>(.+?)</a>', r'\1', body)
    body = body.replace('<br>', '\n')
    body = re.sub(r'<.+?>', '', body)
    return body