Assertion: earthquake | /r/HasProperty | natural phenomenon
Facets:
Source sentences:
text: An earthquake is a natural phenomenon.
text: They are the Earth's natural means of releasing stress.
text: The term "cycle" does not however imply that earthquakes are a periodic or regularly repeating event (in other words, "cycle" does not imply that earthquakes are a natural phenomenon that have clocklike behavior like the rising and setting of the sun).