Assertion: polonium | /r/AtLocation | tobacco
Facets:
value: in uranium ores
type: LOCATION
value: recently
type: TEMPORAL
value: as a contaminant
type: MANNER
Source sentences:
text: Polonium has been found in tobacco as a contaminant and in uranium ores.
text: It has recently been found in the tobacco used in cigarettes.
text: Though rare, it is found in tobacco, and in the soil and air.
text: It has been found in tobacco and in uranium ores.