2. The information processing device according to claim 1 , wherein the circuitry performs a control to exhibit the first number of known type clusters and the second number of unknown type clusters from clusters of the selected clustering standard.
2. The information processing device according to claim 1 , wherein the circuitry performs a control to exhibit the first number of known type clusters and the second number of unknown type clusters from clusters of the selected clustering standard. 3. The information processing device according to claim 2 , wherein the circuitry performs a control to exhibit the first number of known type clusters and the second number of unknown type clusters along with at least a portion of the items included in each said cluster.