About: http://webisa.webdatacommons.org/419418507

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	Tubal sterilization is an increasingly common method of contraception in the United States, and even though pregnancy after sterilization is uncommon, it can occur, and it may be ectopic.
http://www.w3.org/ns/prov#wasQuotedFrom	about.com