About: http://webisa.webdatacommons.org/402653058

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 this case, you can do some research to find a process, material or product which is similar to the one you are looking for, and assume that the emission factors are similar (although of course not the same).
http://www.w3.org/ns/prov#wasQuotedFrom	carbonfootprint.com