Assertion: nebula's star | /r/HasProperty | the hottest known
Facets:
value: at this stage
type: TEMPORAL
Source sentences:
text: Those stars are among the hottest known and are in a state of comparatively rapid evolution.
text: At this stage, the central stars of planetary nebulae (CSPN), or Planetary Nebulae Nuclei (PNN), are among the hottest stars observed in the universe.