Assertion: berkelium's production | /r/HasProperty | millions of metric tons
Facets:
Source sentences:
text: Rank Base Metal 2019 Production (millions of metric tons) #1 Aluminum 64.0 #2 Copper 20.0 #3 Zinc 13.0 #4 Lead 4.5 #5 Nickel 2.7 #6 Tin 0.3