About: http://webisa.webdatacommons.org/87971579

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	FIG. 4 is an example of the upper part of the apparatus: a catalyst container 19 may be put under atmospheric pressure by operating valves 20 and 21.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com