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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:
 async def delegate(self, root):
 """Regional World Assembly Delegate. Returns ------- an :class:`ApiQuery` of :class:`Nation` an :class:`ApiQuery` of None If the region has no delegate. """

        nation = root.find('DELEGATE').text
        if nation == '0':
            return None
        return aionationstates.Nation(nation)