About: http://webisa.webdatacommons.org/402539172

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 Iran's pre-Islamic era, marriage to close relatives, including daughters and sisters, was a common practice with the simple reason to keep up the blood and relation in the monarchial and aristocratic family.
http://www.w3.org/ns/prov#wasQuotedFrom	angelfire.com