About: http://webisa.webdatacommons.org/402348625

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	In essense, this means that pers.private is already set True or False in the __init__ of Person, but pers.marker is a property.
http://www.w3.org/ns/prov#wasQuotedFrom	gramps-project.org