About: http://webisa.webdatacommons.org/145925815

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	X: H, Cl, Br, I, NH2, SCN, CN, N3 ???, NHR, NR2, NR3, ???Sx???, aryl, alkenyl, especially H, Cl, where R has the same definition as R3, set forth above,
http://www.w3.org/ns/prov#wasQuotedFrom	google.com