Assertion: cesium | /r/HasProperty | discovered by robert bunsen
Facets:
value: in 1860
type: TEMPORAL
value: from mineral water
type: LOCATION
Source sentences:
text: Cesium was discovered by Fustov Kirchoff and Robert Bunsen in 1860 from mineral water found in Dürkheim, Germany.
text: Cesium (sometimes spelled ‘caesium’) was discovered by Robert Bunsen and Gustav Kirchhoff in 1860.