About: http://webisa.webdatacommons.org/371528833

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	Migraines are often preceded by aura, a sensory phenomena such as visual or hearing abnormalities.
http://www.w3.org/ns/prov#wasQuotedFrom	bio-medicine.org