About: http://webisa.webdatacommons.org/43551958

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	in vision, such as flashing lights or dark spots, before the headache starts.
http://www.w3.org/ns/prov#wasQuotedFrom	uwhealth.org