About: http://webisa.webdatacommons.org/422232282

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	Suitable cation exchange materials can include acidic functional groups capable of exchanging cations such as ???COOM, ???SO3M, ???PO3M2, and ???C6H4OM, where M is a cation (e.g., hydrogen, sodium, calcium, or copper ion).
http://www.w3.org/ns/prov#wasQuotedFrom	google.com