Assertion: volcano's activity | /r/HasProperty | concentrated at crater
Facets:
value: mainly
type: DEGREE
Source sentences:
text: Volcano guides reported that the activity was concentrated at Crater 3, where explosions ejected glowing fragments and white gas columns that rose 100-200 m in late June.
text: Fieldwork during the third week in October revealed that eruptive activity was mainly concentrated in crater 1, in the NE part of the summit area.