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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 reference_id_from_html(html):
 """\ Extracts the cable's reference identifier from the provided HTML string. `html` The HTML page of the cable. """

    m = _REFERENCE_ID_FROM_HTML_PATTERN.search(html)
    if m:
        return m.group(1)
    raise ValueError("Cannot extract the cable's reference id")