Assertion: flask | /r/MadeOf | borosilicate glass
Facets:
value: (pyrex)
type: OTHER
value: usually
type: TEMPORAL
Source sentences:
text: The flasks are made from borosilicate glass, the type used widely for its chemical and thermal resistance and optical quality.
text: They are usually made of glass or borosilicate glass (Pyrex).
text: The flasks are made from borosilicate glass, the type used widely for its chemical and thermal resistance and optical quality.