About: http://webisa.webdatacommons.org/53912856

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, these materials tend to leave behind ash or other contaminants and are, therefore, undesirable in the manufacture of photonic crystal preforms.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com