About: http://webisa.webdatacommons.org/270224320

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	Insomnia???s underlying causes include physical disorders such as apnea and chronic pain, substance abuse, psychological factors including stress and nightmares, and a poor sleep environment.
http://www.w3.org/ns/prov#wasQuotedFrom	psychologicalscience.org