Assertion: supernova | /r/HasProperty | observed by johnannes kelper
Facets:
value: on october
type: TEMPORAL
Source sentences:
text: The last know Supernova Kelper's Supernova (also called SN 1604) happened in April, 2011, this Supernova was first observed by Johnannes Kelper on October 17, 1601!