"PtO2"@en . _:b8224855 . _:b9163817 . _:b5739945 . . "4" . _:b12064566 . . _:b13991232 . _:b5739947 . . _:b12349329 . _:b5739941 . . . _:b7163249 . _:b13909852 . _:b9491311 . _:b5739943 .