"rare earth element"@en . . "2013-01-03T16:16:42"^^ . "elements, rare earth"@en . "metals, rare earth"@en . "Any of the group of metallic elements whose oxides are classed as rare earths. These include the lanthanide series, yttrium and scandium."@en . . "rare earth elements"@en . "300380215" . "REE (rare earth elements)"@en . "rare-earth elements"@en . "rare-earth metals"@en . "rare-earth metal"@en . . "2014-02-25T12:01:53"^^ . "rare earth metals"@en . "rare earth metal"@en . "rare-earth element"@en .