About: http://webisa.webdatacommons.org/273603224

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	Symptoms usually develop within 4 to 12 hours of ascent and include headache, light-headedness, and, particularly with exercise, shortness of breath.
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com