<http://webisa.webdatacommons.org/155667860>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.fr> .
<http://webisa.webdatacommons.org/prov/299051308>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/155667860> .
<http://webisa.webdatacommons.org/155667860>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/516239695>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/155667860> .
<http://webisa.webdatacommons.org/155667860>	<http://www.w3.org/ns/prov#value>	"The alkali metal aryls used as components in the present catalyst system correspond to the general formula RM', wherein R' is an aryl radical and M' is a metal selected from the group consisting of lithium, sodium, potassium, rubidium and cesium." .