About: http://webisa.webdatacommons.org/391660739

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	Tungsten and molybdenum in the metal compound catalyst can be the cation, such as in a tungsten or molybdenum halide, or the anion as in a tungstate or a molybdate.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com