_:B <http://example.org/family#father> <http://example.org/family#Bob> .
_:B <http://example.org/family#gender> <http://example.org/family#Male> .
_:G <http://example.org/family#father> <http://example.org/family#Bob> .
_:G <http://example.org/family#gender> <http://example.org/family#Female> .