About: http://webisa.webdatacommons.org/278429263

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	Sleep is a state characterized by little physical activity and almost no awareness of the outside world, and though doctors do not completely understand its significance, sleep is clearly essential for life.
http://www.w3.org/ns/prov#wasQuotedFrom	medicaldaily.com