Assertion: nebula's star | /r/CapableOf | create the cat's eye nebula
Facets:
Source sentences:
text: Observations suggest the star that created the Cat's Eye Nebula ejected its mass in a series of pulses at 1,500-year intervals.
text: Observations suggest the star that created the Cat’s Eye Nebula ejected its mass in a series of pulses at 1,500-year intervals.