How many countries participated in Desert Storm?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q6173448', 'id': 0, 'label': 'Wikipedia:Vital articles/Level/4'}, {'type': 'INTERNAL', 'name_': 'Q30', 'id': 1, 'label': 'United States of America'}, {'type': 'INTERNAL', 'name_': 'Q35', 'id': 2, 'label': 'Denmark'}, {'type': 'INTERNAL', 'name_': 'Q3913', 'id': 3, 'label': 'binary numeral system'}, {'type': 'INTERNAL', 'name_': 'Q25457532', 'id': 4, 'label': 'positional numeral system'}, {'type': 'INTERNAL', 'name_': 'Q37643', 'id': 5, 'label': 'Gulf War'}, {'type': 'INTERNAL', 'name_': 'Q60149', 'id': 6, 'label': 'flag of Denmark'}, {'type': 'INTERNAL', 'name_': 'Q30302774', 'id': 7, 'label': '34:28'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q2349281', 'id': 8, 'label': 'Operation Desert Storm'}, {'type': 'INTERNAL', 'name_': 'Q110990843', 'id': 9, 'label': 'Base 34'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q712639', 'id': 10, 'label': '34'}], 'links': [{'name_': 'P5008', 'source': 1, 'target': 0, 'label': 'on focus list of Wikimedia project'}, {'name_': 'P17', 'source': 1, 'target': 1, 'label': 'country'}, {'name_': 'P530', 'source': 1, 'target': 2, 'label': 'diplomatic relation'}, {'name_': 'P793', 'source': 1, 'target': 5, 'label': 'significant event'}, {'name_': 'P5008', 'source': 3, 'target': 0, 'label': 'on focus list of Wikimedia project'}, {'name_': 'P31', 'source': 3, 'target': 4, 'label': 'instance of'}, {'name_': 'P5008', 'source': 5, 'target': 0, 'label': 'on focus list of Wikimedia project'}, {'name_': 'P710', 'source': 5, 'target': 1, 'label': 'participant'}, {'name_': 'P1001', 'source': 6, 'target': 2, 'label': 'applies to jurisdiction'}, {'name_': 'P2061', 'source': 6, 'target': 7, 'label': 'aspect ratio (W:H)'}, {'name_': 'P4934', 'source': 7, 'target': 10, 'label': 'calculated from'}, {'name_': 'P361', 'source': 8, 'target': 5, 'label': 'part of'}, {'name_': 'P31', 'source': 9, 'target': 4, 'label': 'instance of'}, {'name_': 'P3264', 'source': 9, 'target': 10, 'label': 'radix'}]}