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http://www.w3.org/1999/02/22-rdf-syntax-ns#type
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  • Gallbladder removal surgery, also called cholecystectomy, is carried out in people who have recurring gallbladder problems such as gallstones or gallbladder disease.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wisegeekhealth.com