<http://webisa.webdatacommons.org/prov/516268811>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/387802113> .
<http://webisa.webdatacommons.org/387802113>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<docstoc.com> .
<http://webisa.webdatacommons.org/387802113>	<http://www.w3.org/ns/prov#value>	"Heteropoly-anions constituting the heteropolyacids and salts thereof may have various compositions. Heteropoly-anions preferably have a composition represented by: XM.sub.12O.sub.40, wherein X is an element such as Si or P; and M is another" .
<http://webisa.webdatacommons.org/387802113>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .