About: http://webisa.webdatacommons.org/182049654

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	For instance, active volcanoes and decaying vegetation emit sulfur and carbon compounds that react with water, oxygen, and other chemicals in the atmosphere to form various acidic compounds.
http://www.w3.org/ns/prov#wasQuotedFrom	pbslearningmedia.org