Assertion: silvery metallic element | /r/ObjectUse | used in magnesium and aluminum alloys
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Source sentences:
text: Y, atomic number 39, yttrium a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys
text: Y, atomic number 39, yttrium a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys