About: http://webisa.webdatacommons.org/408455173

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	Such factors as abdominal wall scarring, maternal obesity, or an incompletely filled maternal bladder may prevent visualization of the cord entry into the placenta and/or visualization of fetal vessels over the cervix.
http://www.w3.org/ns/prov#wasQuotedFrom	lww.com