About: http://webisa.webdatacommons.org/404474239

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	Primes of the unit symbols, e.g., M???, D???, T???, and Q??? denote substituents other than methyl, and must be specifically defined for each occurrence.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au