About: http://webisa.webdatacommons.org/175662438

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	Again, since layer 157 is a hard, dense material, upon being encountered during the polishing operation, it significantly retards removal of the wafer, so that it acts as a grind/polish stop.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com