About: http://webisa.webdatacommons.org/66809873

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	Scientists had previously thought that the maintenance of stem cells depended on activating signals from outside, including growth factors and other chemicals.
http://www.w3.org/ns/prov#wasQuotedFrom	bio-medicine.org