<http://webisa.webdatacommons.org/prov/16476743> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/300794605> . <http://webisa.webdatacommons.org/prov/88304968> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/300794605> . <http://webisa.webdatacommons.org/300794605> <http://www.w3.org/ns/prov#wasQuotedFrom> <uncommondescent.com> . <http://webisa.webdatacommons.org/300794605> <http://www.w3.org/ns/prov#value> "I???ve read an optimistic estimate by paleontologists that as much as 10% of species may have left fossils (although the portion varies between groups due to e.g. habitat, behavior, size and structure)." . <http://webisa.webdatacommons.org/300794605> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> .