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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 are_equivalent_xml(a_xml, b_xml):
 """Check if two ReplicationPolicy XML docs are semantically equivalent. The ReplicationPolicy XML docs are normalized before comparison. Args: a_xml, b_xml: ReplicationPolicy XML docs to compare Returns: bool: ``True`` if the resulting policies for the two objects are semantically equivalent. """

    return are_equivalent_pyxb(
        d1_common.xml.deserialize(a_xml), d1_common.xml.deserialize(b_xml)
    )