Assertion: quasar | /r/HasAspect | absorption regions
Facets:
value: in front of them
type: LOCATION
Source sentences:
text: The oldest quasars (redshift ≥ 6) display a Gunn-Peterson trough and have absorption regions in front of them indicating that the intergalactic medium at that time was neutral gas.
text: The oldest quasars (redshift ≥ 6) display a Gunn-Peterson trough and have absorption regions in front of them indicating that the intergalactic medium at that time was neutral gas.