About: http://webisa.webdatacommons.org/415258842

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	Comets, sometimes called ???dirty snowballs,??? are composed of rock, dust, water ice, and frozen gases, including methane, carbon dioxide, carbon monoxide and ammonia.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com