Assertion: boron's compound | /r/HasProperty | flammable
Facets:
value: highly
type: DEGREE
Source sentences:
text: Many compounds that contain boron are highly flammable, but the free element is not found in the natural world in a pure form.
text: One compound containing boron, called boron trifluoride etherate, is not only flammable but may explode on contact with air.