About: http://webisa.webdatacommons.org/107935664

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	Coal contains arsenic, boron, and heavy metals such as lead, chromium, cadmium, and mercury (see summary contaminants in coal in Gottlieb et al. 2010).
http://www.w3.org/ns/prov#wasQuotedFrom	coaltrainfacts.org