The table below is a small part of the Acute Inflammations Data Set 1. a1 Temperature of patient ( 35C-42C ) a2 Occurrence of nausea ( yes, no ) a3 Lumbar pain ( yes, no ) a4 Urine pushing (continuous need for urination) ( yes, no ) a5 Micturition pains ( yes, no ) a6 Burning of urethra, itch, swelling of urethra outlet ( yes, no ) d1 decision: Inflammation of urinary bladder ( yes, no ) d2 decision: Nephritis of renal pelvis origin ( yes, no ) Here the attributes a1-a6 are observations, and the decisions d1 and d2 are made by a medical expert. The purpose of studying this data set is to predict presumptive diagnosis of two diseases of the urinary system, namely, "Inflammation of urinary bladder" and "Nephritis of renal pelvis origin".