About: http://webisa.webdatacommons.org/147556053

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	They are made from compacted sawdust, wood chips, bark, agricultural crop waste, waste paper and other organic materials.
http://www.w3.org/ns/prov#wasQuotedFrom	heatilator.com