Assertion: orion nebula | /r/HasProperty | well-known object
Facets:
value: like the pleiades
type: OTHER
value: like praesepe
type: LOCATION
value: at the time
type: TEMPORAL
Source sentences:
text: The Orion Nebula was a well-known object at the time, much like Praesepe and the Pleiades, and not likely to be confused for a comet, but Messier added these to his catalogue nonetheless.