About: http://webisa.webdatacommons.org/13841514

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	This is done by recognizing certain red flags, which include things such as abrupt onset of the worst headache of life, headaches with certain types of symptoms such as weakness, and onset of headaches older than age fifty.
http://www.w3.org/ns/prov#wasQuotedFrom	midstatemedical.org