Assertion: nova | /r/HasProperty | event
Facets:
Source sentences:
text: A nova was an event in which a star dramatically increased in brightness for a relatively short period of time.
text: A nova is an event marked by the sudden appearance of a bight, seemingly new star, which fades over a period of weeks or months.
text: Nova and Supernova are events taking place in our galaxy on a regular basis.