About: http://webisa.webdatacommons.org/325879379

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	in which R is cyclopentadienyl or a C1 -C6 alkyl radical or a halogen, in particular chlorine, Me is a transition metal, for example titanium and particularly zirconium and Hal is a halogen, in particular chlorine, and
http://www.w3.org/ns/prov#wasQuotedFrom	google.es