About: http://webisa.webdatacommons.org/221519481

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	For girls, their first menstruation, or period, is a sign that they have reached puberty.
http://www.w3.org/ns/prov#wasQuotedFrom	iwannaknow.org