Assertion: supernova | /r/HasProperty | supernova 1987a
Facets:
value: in the year
type: TEMPORAL
Source sentences:
text: The most recent supernova visible to the eye was Supernova 1987A, in the year 1987.
text: This supernova, called Supernova 1987A, was the first visible to the naked eye since 1604.