Assertion: mirror | /r/MadeOf | glass
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Though mirrors are often made from glass, they can also be made of other reflective substances such as crystal, salt, ice, or polished metals.
text: Though mirrors are often made from glass, they can also be made of other reflective substances such as crystal, salt, ice, or polished metals.