About: http://webisa.webdatacommons.org/284449420

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	It will be understood that, in many cases, the liquid flowing through the pores will have some sand or other solid grains entrained in the flow.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com