About: http://webisa.webdatacommons.org/96147618

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	R3 and R4 are identical or different and are a mono- or polynuclear hydrocarbon radical capable of forming a sandwich structure with the central atom M1.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com