code: def get(self, key, lang=None):
          
          if lang is not None:
              for o in self.graph.objects(self.asNode(), key):
                  if o.language == lang:
                      yield o
          else:
              for o in self.graph.objects(self.asNode(), key):
                  yield o
docs: Returns triple related to this node. Can filter on lang
  
          :param key: Predicate of the triple
          :param lang: Language of the triple if applicable
          :rtype: Literal or BNode or URIRef