<http://webisa.webdatacommons.org/prov/331692606>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/290077793> .
<http://webisa.webdatacommons.org/290077793>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/290077793>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<medicalxpress.com> .
<http://webisa.webdatacommons.org/290077793>	<http://www.w3.org/ns/prov#value>	"Protherial (egg-laying) and metatherial (marsupial) mammals produce a choriovitelline placenta that, while connected to the uterine wall, provides nutrients mainly derived from the egg sac." .