About: http://webisa.webdatacommons.org/267608975

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	Since you mentioned being an advanced user I skipped the most obvious reasons, such as the computer not being plugged in.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com