Assertion: uranium | /r/HasProperty | discovered by martin heinrich klaproth
Facets:
value: in 1789
type: TEMPORAL
value: in the mineral pitchblende
type: LOCATION
Source sentences:
text: Uranium was first discovered by Martin Heinrich Klaproth in 1789 but rose to prominence in 1938 with the discovery of nuclear fission, in which an isotope of uranium, U-235, is split at the atomic level, releasing a great amount of energy.
text: Uranium was discovered by Martin Heinrich Klaproth, a German chemist, in the mineral pitchblende (primarily a mix of uranium oxides) in 1789.