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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 get_entity(self):
 """ Returns `entity` but will make an API call if necessary. """

        if not self.entity and await self.get_input_entity():
            try:
                self._entity =\
                    await self._client.get_entity(self._input_entity)
            except ValueError:
                pass

        return self._entity