Assertion: berkelium | /r/HasProperty | discovered after plutonium
Facets:
Source sentences:
text: Berkelium was the fifth transuranium element discovered after neptunium, plutonium, curium and americium.
text: Berkelium was discovered after americium, curium, plutonium, and neptunium and belongs to the transuranium and actinide series.
text: Berkelium was the fifth transuranium element discovered after neptunium, plutonium, curium and americium.
text: Berkelium was the fifth transuranium element discovered after neptunium, plutonium, curium and americium.