_:B9f345f871d032b042637337ca8e0e5d4 . . . "Lanthanides"@en . "Lanthaniden"@nl . "Zeldzame aardmetalen"@nl . "4f-elementen"@nl . . _:B9f345f871d032b042637337ca8e0e5d4 . _:B9f345f871d032b042637337ca8e0e5d4 "2021-09-24"^^ . _:B9f345f871d032b042637337ca8e0e5d4 . _:B9f345f871d032b042637337ca8e0e5d4 . _:B9f345f871d032b042637337ca8e0e5d4 "078570530" . _:B9f345f871d032b042637337ca8e0e5d4 . _:B9f345f871d032b042637337ca8e0e5d4 . _:B9f345f871d032b042637337ca8e0e5d4 .