About: http://webisa.webdatacommons.org/170326984

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	The most common symptom is headaches, which can be migraine headaches (or migraine varients such as hemicrania continua) or new persistent daily headaches.
http://www.w3.org/ns/prov#wasQuotedFrom	medhelp.org