About: http://webisa.webdatacommons.org/213150757

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	Listing two children in the order in which they might be born, we note four possibilities: B-B, B-G, G-B, G-G. Since you know that at least one of the two children is a boy, the G-G possibility is eliminated.
http://www.w3.org/ns/prov#wasQuotedFrom	go.com