"ocean floor"^^ . . _:b1217016 . "The surface that underlies an ocean."^^ . _:b1217016 . "ocean bed"^^ . "ENVO:00000426"^^ . . . "ENVO"^^ . "FTT:1020"^^ . "ocean floor feature"^^ . "Wikipedia:Ocean_floor"^^ . _:b1217016 . _:b1217016 .