About: http://webisa.webdatacommons.org/243247023

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	In some cases, mainly due to space shortage, solids are removed by flotation, usually by the dissolved-air flotation (DAF) system.
http://www.w3.org/ns/prov#wasQuotedFrom	issuu.com