About: http://webisa.webdatacommons.org/254529372

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	Such chemistry requires metals, namely elements other than hydrogen or helium and thereby suggests that a planetary system rich in metals is a necessity for life.
http://www.w3.org/ns/prov#wasQuotedFrom	wikipedia.org