11. A Non-transitory computer readable storage medium having a computer program for causing a computer to stabilize a knowledge graph, the computer readable medium comprising: code for a knowledge graph generating unit, the knowledge graph generating unit being operable to generate the knowledge graph in which same entities in a semantic relation list of entities provided as an input are represented as a single node based on names and types of the entities; code for an entity similarity computing unit, the entity similarity computing unit being operable to compute, on the knowledge graph, semantic similarities between available entity pairs of same entity types by comparing, for each available entity pair, a type of relation associated with one entity in the entity pair and that of the other entity in the entity pair; code for a same entity integrating unit, the same entity integrating unit being operable to select, based on the semantic similarities, a representative entity from each of semantically similar entity pairs on the knowledge graph and integrate an entity that is not selected as the representative entity into the representative entity; and code for a relation weighted value computing unit, the relation weighted value computing unit being operable to compute relation weighted values between the entities by using a graph analysis and statistical information, and add the relation weighted values to the knowledge graph.
11. A Non-transitory computer readable storage medium having a computer program for causing a computer to stabilize a knowledge graph, the computer readable medium comprising: code for a knowledge graph generating unit, the knowledge graph generating unit being operable to generate the knowledge graph in which same entities in a semantic relation list of entities provided as an input are represented as a single node based on names and types of the entities; code for an entity similarity computing unit, the entity similarity computing unit being operable to compute, on the knowledge graph, semantic similarities between available entity pairs of same entity types by comparing, for each available entity pair, a type of relation associated with one entity in the entity pair and that of the other entity in the entity pair; code for a same entity integrating unit, the same entity integrating unit being operable to select, based on the semantic similarities, a representative entity from each of semantically similar entity pairs on the knowledge graph and integrate an entity that is not selected as the representative entity into the representative entity; and code for a relation weighted value computing unit, the relation weighted value computing unit being operable to compute relation weighted values between the entities by using a graph analysis and statistical information, and add the relation weighted values to the knowledge graph. 13. The non-transitory computer readable storage medium of claim 11 , wherein the knowledge graph generating unit is operable to integrate the same entities in the semantic relation list to generate the knowledge graph, express on a relation node a first date and a last date of the same semantic relation by using dates of respective semantic relations in the knowledge graph, compute a weighted sum of the same semantic relation in the semantic relation list, and represent the weighted sum on the knowledge graph.