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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 get_startup_comments(self, id_):
 """ Retrieve the comments of a particular startup """

    return _get_request(_STARTUP_C.format(c_api=_C_API_BEGINNING,
                                                               api=_API_VERSION,
                                                               id_=id_,
                                                               at=self.access_token))