About: http://webisa.webdatacommons.org/434831768

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	However, the eradication of a disease is an immensely difficult task, fully achieved only once, with the last reported case of smallpox in 1977, and global eradication announced in 1980.
http://www.w3.org/ns/prov#wasQuotedFrom	who.int