About: http://webisa.webdatacommons.org/426448807

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	The proof is easy if you step back a bit from the infinite sum and conditional math [which do work but requires effort!] Each baby is a boy or girl with 50% probability by definition.
http://www.w3.org/ns/prov#wasQuotedFrom	fogcreek.com