About: http://webisa.webdatacommons.org/152866064

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 a similar manner more than two tuning forks, including tuning forks of the closed-end type (described below) may be employed to measure a number of gases or to monitor the temperature and pressure and to detect a chemical.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com