Assertion: tungsten | /r/HasProperty | valuable metal
Facets:
value: classically
type: DEGREE
value: very
type: DEGREE
Source sentences:
text: Tungsten has classically been a very valuable metal, since its durability and strength make it extremely useful for military and industrial uses.
text: Tungsten, also known as Wolfram is one of the scarce metals we have today and its becoming more popular in the world of darts.