Assertion: boron | /r/ObjectUse | used in welding
Facets:
value: in making pyrex glass
type: LOCATION
value: in pyrotechnic flares
type: LOCATION
value: in fireworks
type: LOCATION
Source sentences:
text: It is also used in soldering and welding as a flux, in making Pyrex glass, and in pyrotechnic flares and fireworks.