About: http://webisa.webdatacommons.org/146825815

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	No sooner has the oxygen level dropped below a critical threshold, or growth factors such as vascular endothelial growth factor (VEGF) and placental growth factor (PIGF) are produced to stimulate the development of blood vessels.
http://www.w3.org/ns/prov#wasQuotedFrom	vib.be