<http://webisa.webdatacommons.org/321701207>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<enn.com> .
<http://webisa.webdatacommons.org/prov/436071364>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/321701207> .
<http://webisa.webdatacommons.org/321701207>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/321701207>	<http://www.w3.org/ns/prov#value>	"Mercury is a highly toxic element that occurs naturally in the environment but also has been introduced through mining and industrial activity." .