About: http://webisa.webdatacommons.org/57403052

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	Headache is a non-specific symptom, which means that it has many possible causes.
http://www.w3.org/ns/prov#wasQuotedFrom	scirp.org