About: http://webisa.webdatacommons.org/295915308

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	Alice uses her PrivKeyA to cryptographically sign M' (which mostly means hashing M' and encrypting the result with that private key, in the case of RSA), which gives us Sign(M',PrivKeyA)
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com