_:B51adcfaa348e323207a3aafbb4014814 . . . . "gassen ; natuurkunde"@nl . . . . _:B51adcfaa348e323207a3aafbb4014814 . _:B51adcfaa348e323207a3aafbb4014814 . _:B51adcfaa348e323207a3aafbb4014814 "2021-09-24"^^ . _:B51adcfaa348e323207a3aafbb4014814 . _:B51adcfaa348e323207a3aafbb4014814 . _:B51adcfaa348e323207a3aafbb4014814 "075659190" . _:B51adcfaa348e323207a3aafbb4014814 . _:B51adcfaa348e323207a3aafbb4014814 . _:B51adcfaa348e323207a3aafbb4014814 .