Assertion: nebula's designation | /r/HasProperty | messier
Facets:
Source sentences:
text: Nebula Type: Planetary Designations: Messier 57, M57, NGC 6720, Ring Nebula, PK 063+13 1, GC 4447, BD+32 3246, CSI+32-18517, VV 214, WD 1851+329,