. _:GhMKnIni1231. _:GhMKnIni1232. _:GhMKnIni1233. . . . . . . "Source: Freebase - The World's database". . "1960-01-24". . . . . . "Robbert Dijkgraaf"@de. "\u30ED\u30D9\u30EB\u30C8\u30FB\u30C0\u30A4\u30AF\u30E9\u30FC\u30D5"@ja. "Robbert Dijkgraaf"@en. . . . . . . . . _:GhMKnIni1231 . _:GhMKnIni1231 "661242". _:GhMKnIni1232 . _:GhMKnIni1232 "Robbert_Dijkgraaf". _:GhMKnIni1233 . _:GhMKnIni1233 "robbert_dijkgraaf".