About: http://webisa.webdatacommons.org/99209184

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	Owing to its being a free coal, free from sulphur, iron, phosphorus and other substances, the wear and tear on boiler flues and grates would be less than with other coal that carries more or less of these impurities.
http://www.w3.org/ns/prov#wasQuotedFrom	mifamilyhistory.org