About: http://webisa.webdatacommons.org/4531403

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	Hydrogen, for example, is a strong reducing agent, and when ingested into a sulfate-containing glass would result in the evolution of sulfur dioxide, which would act as a blowing agent to form bubbles in the glass.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com