About: http://webisa.webdatacommons.org/423695784

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	(/dev/stdin works with all Linux programs, while - is a convention used by some programs, including grep.)
http://www.w3.org/ns/prov#wasQuotedFrom	superuser.com