About: http://webisa.webdatacommons.org/146466164

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	Some of the most common causes of chronic headaches are the habitual use of analgesics, caffeine withdrawal, a reaction to head or neck trauma, stress, tension, food additives, and the use of recreational drugs such as marijuana.
http://www.w3.org/ns/prov#wasQuotedFrom	wisegeek.net