Assertion: lamp's bulb | /r/HasProperty | filled with argon
Facets:
Source sentences:
text: The first plasma lamp was an ultraviolet curing lamp with a bulb filled with argon and mercury vapor, developed by Fusion UV.
text: That lamp led Fusion Systems to develop the sulfur lamp, which concentrates microwaves through a hollow waveguide to bombard a bulb filled with argon and sulfur.