Assertion: affinity's use | /r/HasProperty | confined to element
Facets:
value: almost always
type: TEMPORAL
value: in groups
type: LOCATION
Source sentences:
text: Electron affinities are the negative ion equivalent, and their use is almost always confined to elements in groups 6 and 7 of the Periodic Table.
text: Electron affinities are the negative ion equivalent, and their use is almost always confined to elements in groups 16 and 17 of the Periodic Table.