Assertion: volcano's eruption | /r/HasProperty | separated by long quiet intervals
Facets:
Source sentences:
text: However, the geologic history of the Lassen area indicates that volcanism there is episodic, having periods of relatively frequent eruptions separated by long quiet intervals.
text: However, the geologic history of the Lassen area indicates that volcanism there is episodic, having periods of relatively frequent eruptions separated by long quiet intervals.