About: http://webisa.webdatacommons.org/24533407

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Four decades earlier, in the 1930s, political officials and doctors in Europe and South Africa had begun studying the exposure of miners to coal, diamonds, and other minerals.
http://www.w3.org/ns/prov#wasQuotedFrom	auntminnie.com