About: http://webisa.webdatacommons.org/353158405

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 different establishments the proportions vary, as in the manufacture of all other forms of glass products, and even in the same establishment uniformity is far from absolute.
http://www.w3.org/ns/prov#wasQuotedFrom	wikisource.org