Assertion: atom's bond | /r/HasProperty | stable
Facets:
value: very
type: DEGREE
value: completely
type: DEGREE
Source sentences:
text: Before graphene was isolated, it was commonly believed that two dimensional compounds could not exist because they would be too unstable, but the carbon-to-carbon bonds in graphene are small and strong and completely stable.
text: They are possible because carbon atoms are able to form very stable bonds with other carbon atoms.