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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 _load_entities(self):
 """ Must load all the entities it needs from cache, and return ``False`` if it could not find all of them. """

        if not self._chat_peer:
            return True  # Nothing to load (e.g. MessageDeleted)

        self._chat, self._input_chat = self._get_entity_pair(self.chat_id)
        return self._input_chat is not None