Assertion: sulfur hexafluoride | /r/ObjectUse | used in medicine
Facets:
value: for eye surgery
type: PURPOSE
value: for ultrasound imaging
type: PURPOSE
Source sentences:
text: Sulfur hexafluoride is a specialty gas, used in medicine for eye surgery and ultrasound imaging; in industry as a tracer gas, dielectric, and as an etchant; and mixed with argon as an insulator between layers of windows.