About: http://webisa.webdatacommons.org/178587393

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	The collection layer can include undesirable material such as excess precursor(s), secondary phase precipitates, impurities, residue and/or debris.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com