def getObjectByPid(self, pid):
        """
    Args:
      pid : str

    Returns:
      str : URIRef of the entry identified by ``pid``."""
        self._check_initialized()
        opid = rdflib.term.Literal(pid)
        res = [o for o in self.subjects(predicate=DCTERMS.identifier, object=opid)]
        return res[0]
Args:
      pid : str

    Returns:
      str : URIRef of the entry identified by ``pid``.