About: http://webisa.webdatacommons.org/212918142

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	A major problem in oil production is the precipitation of asphaltenes or of waxes which, like mineral scales, can block the flow of oil through the formation or through pipelines and other well-head, storage or refinery equipment.
http://www.w3.org/ns/prov#wasQuotedFrom	sumobrain.com