About: http://webisa.webdatacommons.org/378239578

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	An underlying medical or psychological condition, such as depression or sleep apnea, often causes secondary insomnia.
http://www.w3.org/ns/prov#wasQuotedFrom	adam.com