+ "graph": {
+ "city_hall": "三里屯市政厅",
+ "fire_department": "三里屯消防站",
+ "memory_isle_park": "北海公园",
+ "riverwalk_trail": "河滨小道",
+ "w_michigan_ave": "南京西路",
+ "e_michigan_ave": "南京东路",
+ "spring_st": "解放路",
+ "scidmore_park": "中山公园",
+ "petting_zoo": "野生动物园",
+ "n_andrews_st": "北五环",
+ "s_andrews_st": "南五环",
+ "n_constantine_st": "北光明路",
+ "s_constantine_st": "南光明路",
+ "rocky_river": "李家沟",
+ "railroad_dr": "铁道线",
+ "conrail_rr": "大秦铁路",
+ "st_joseph_river": "吴淞江",
+ "n_main_st": "北二环",
+ "s_main_st": "南二环",
+ "water_st": "水岸路",
+ "foster_st": "跃进街",
+ "portage_river": "货运河",
+ "flower_st": "幸福街",
+ "elm_st": "江榆路",
+ "walnut_st": "江松路",
+ "morris_ave": "世纪大道",
+ "east_st": "东街",
+ "portage_ave": "货运大道"
+ },