13. The morpheme analyzer of claim 12 , wherein the additional information comprises category information and address information associated with the morpheme analysis target.
13. The morpheme analyzer of claim 12 , wherein the additional information comprises category information and address information associated with the morpheme analysis target. 14. The morpheme analyzer of claim 13 , wherein the plural key creator comprises: a first key creator configured to create a first key by analyzing a morpheme of the category information; and a second key creator configured to create a second key by analyzing a morpheme of the address information.