_:B81a62228f804d7a43a445bf40552dea4 . _:B81a62228f804d7a43a445bf40552dea4 "2021-02-08"^^ . _:B81a62228f804d7a43a445bf40552dea4 . _:B81a62228f804d7a43a445bf40552dea4 . _:B81a62228f804d7a43a445bf40552dea4 . _:B81a62228f804d7a43a445bf40552dea4 . _:B81a62228f804d7a43a445bf40552dea4 . "Janssen" . "Arthur" . "Janssen, Arthur (1886-1979)" . . . "jans396" . . _:B81a62228f804d7a43a445bf40552dea4 . . "Arthur Janssen" . "1979"^^ . "1886"^^ . "Arthur Janssen" .