Assertion: black hole collision | /r/HasProperty | detected
Facets:
value: between 9 and 23 august
type: TEMPORAL
Source sentences:
text: The three other black-hole collisions were detected between 9 and 23 August 2017, were between three and six billion light years away and ranged in size for the resulting black holes from 56 to 66 times larger than our Sun.