About: http://webisa.webdatacommons.org/254960157

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	al such lithium, cesium, rubidium, potassium and sodium or an alkaline earth metal such as barium, beryllium, magnesium, calcium, strontium and radium, and quaternary ammonium ion.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com