About: http://webisa.webdatacommons.org/369537191

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	All these gases, except carbon dioxide, are acutely toxic at levels well below 500 ppm.
http://www.w3.org/ns/prov#wasQuotedFrom	imtech.res.in