About: http://webisa.webdatacommons.org/99108732

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	This was a genealogical bottleneck, a chokepoint where the choice of partners narrowed tremendously, and where through marriage and survivorship there was a possibility of tremendous upward social mobility.
http://www.w3.org/ns/prov#wasQuotedFrom	genealogy.com