Assertion: beryllium | /r/HasProperty | a silver-gray metallic element
Facets:
Source sentences:
text: Beryllium Is a Silver-Gray Metallic Element
text: Beryllium is a silver-grey metal and is hard and brittle at room temperature.
text: Beryllium - a silver-gray metallic element that occurs naturally in about 30 minerals - is lighter than aluminum yet stiffer than steel.
text: Beryllium Is a Silver-Gray Metallic Element