About: http://webisa.webdatacommons.org/40409174

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	However, the main problem which is encountered in this type of apparatus results from the need to use corrosive gases such as chlorine and sulphur dioxide.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com