About: http://webisa.webdatacommons.org/84258549

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	After the first launch on Apr. 12, 1981 ??? 20 years to the day after Yuri Gagarin's historic flight ??? Shuttles flew two to nine missions a year, except in 1986 and 1987 when flights were suspended following the Challenger disaster.
http://www.w3.org/ns/prov#wasQuotedFrom	daviddarling.info