About: http://webisa.webdatacommons.org/397987432

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 who have been followed to an age when they are menstruating (or are of an age when pregnancy is a possibility), a negative pregnancy test.
http://www.w3.org/ns/prov#wasQuotedFrom	clinicaltrials.gov