About: http://webisa.webdatacommons.org/130184565

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	Put some sand or other mild abrasive into the glass vessel, some water/solvent and surfactant, and shake vigorously.
http://www.w3.org/ns/prov#wasQuotedFrom	boingboing.net