code: def deserialize_uri(value):
      
      if isinstance(value, BNode):
          return value
      if isinstance(value, URIRef):
          return value
      if not value:
          return None
      if not isinstance(value, basestring):
          raise ValueError("Cannot create URI from {0} of type {1}".format(value, value.__class__))
      if value.startswith("_:"):
          return BNode(value[2:])
      return URIRef(value)
docs: Deserialize a representation of a BNode or URIRef.