Assertion: bunsen burner | /r/HasProperty | pioneer
Facets:
value: in the fledgling field of spectrometry
type: LOCATION
value: in photochemistry
type: OTHER
Source sentences:
text: Bunsen also developed several gas-analytical methods, was a pioneer in photochemistry, and did early work in the field of organoarsenic chemistry.
text: He was a pioneer in the fledgling field of spectrometry, the originator of the antidote for arsenic poisoning and still found time to discover the two chemical elements caesium and rubidium.