Assertion: glass's strength | /r/HasProperty | high
Facets:
Source sentences:
text: The mechanical strength is high, and the intensity change is proportional to the apparent density.
text: S-glass ("S" for "stiff") is used when tensile strength (high modulus) is important, and is thus an important building and aircraft epoxy composite (it is called R-glass, "R" for "reinforcement" in Europe).