About: http://webisa.webdatacommons.org/244044120

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	Various factors, for example room size, openness of the area, etc., proximity of the generator to the patient, and generator output determine the time needed for the environment to achieve the desired ion density.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr