Assertion: volcano's vent | /r/CapableOf | show gradual decline
Facets:
value: during the eruption
type: TEMPORAL
value: in lava output rate
type: OTHER
Source sentences:
text: During the eruption, the effusive vent, at 680 m elevation on the NE side of the Sciara del Fuoco, showed a gradual decline in lava output rate.