Assertion: seamount | /r/HasProperty | active
Facets:
value: for 2 or 3 million years
type: TEMPORAL
value: volcanically
type: MANNER
Source sentences:
text: A seamount might stay volcanically active for 2 or 3 million years while it is above a hotspot: lava streams out of it summit and down its flanks, building up a volcanic mountain much as is happening today on the island of Hawaii.