About: http://webisa.webdatacommons.org/24653508

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	To wrap it up, sand filters are the most economical option but require periodic backwashing.
http://www.w3.org/ns/prov#wasQuotedFrom	inyopools.com