About: http://webisa.webdatacommons.org/199018257

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	Contrast agents such as barium or iodine are used to attenuate or block X-rays such that the contrast between various structures is increased.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es