<http://webisa.webdatacommons.org/prov/308244290> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/239435681> . <http://webisa.webdatacommons.org/239435681> <http://www.w3.org/ns/prov#wasQuotedFrom> <integrisequipment.com> . <http://webisa.webdatacommons.org/239435681> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/239435681> <http://www.w3.org/ns/prov#value> "One advantage of the Doppler fetal monitor over a (purely acoustic) fetal stethoscope is the electronic audio output, which allows people other than the user to hear the heartbeat." .