About: http://webisa.webdatacommons.org/224004613

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	The Orion nebula is an emission nebula, in that it emits light, as opposed to an absorption or dark nebula, which absorbs light (e.g. Horsehead Nebula, also in Orion).
http://www.w3.org/ns/prov#wasQuotedFrom	howstuffworks.com