Original graph construction information:
                    ** 41 entities extracted **
                        - paper entity: 18
                        - method entity: 20
                        - problem entity: 0
                        - domain entity: 3
                    ** 44 relations extracted **
                    ** Graph optimization status: Success **
                    ** Checked the graph **
                        - removed duplicates
                        - aligned the entity names in the entity list and the relation list
                        - removed discrete entities
                    ** Complete 17/18 citation information **