code: def get(self, cid1, cid2, annotator_id):
          '''Retrieve a relation label from the store.
          '''
          t = (cid1, cid2, annotator_id)
          for k, v in self.kvl.scan(self.TABLE, (t, t)):
              return self._label_from_kvlayer(k, vf get(self, cid1, cid2, annotator_id):
          '''Retrieve a relation label from the store.
          '''
          t = (cid1, cid2, annotator_id)
          for k, v in self.kvl.scan(self.TABLE, (t, t)):
              return self._label_from_kvlayer(k, v)
docs: Retrieve a relation label from the store.