Assertion: sunspot's region | /r/HasProperty | covered by lava
Facets:
value: during a volcanic eruption
type: TEMPORAL
value: during the permian period
type: TEMPORAL
Source sentences:
text: In this new effort, the researchers gathered petrified tree samples from a region of Germany that was covered by lava during a volcanic eruption approximately 290 million years ago (during the Permian period), offering a historical record of sun activity.