How many permanent members of the Security Council were there at the founding of the U.N. in 1945?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q6173448', 'id': 0, 'label': 'Wikipedia:Vital articles/Level/4'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q1065', 'id': 1, 'label': 'United Nations'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q37470', 'id': 2, 'label': 'United Nations Security Council'}, {'type': 'INTERNAL', 'name_': 'Q13382529', 'id': 3, 'label': 'WikiProject Human Rights'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q170075', 'id': 4, 'label': 'United Nations Economic and Social Council'}, {'type': 'INTERNAL', 'name_': 'Q685248', 'id': 5, 'label': 'United Nations Commission on Human Rights'}, {'type': 'INTERNAL', 'name_': 'Q191866', 'id': 6, 'label': 'AIESEC'}, {'type': 'INTERNAL', 'name_': 'Q16995240', 'id': 7, 'label': 'International Union for Land Value Taxation'}], 'links': [{'name_': 'P5008', 'source': 2, 'target': 0, 'label': 'on focus list of Wikimedia project'}, {'name_': 'P361', 'source': 2, 'target': 1, 'label': 'part of'}, {'name_': 'P5008', 'source': 2, 'target': 3, 'label': 'on focus list of Wikimedia project'}, {'name_': 'P5008', 'source': 5, 'target': 3, 'label': 'on focus list of Wikimedia project'}, {'name_': 'P355', 'source': 5, 'target': 4, 'label': 'has subsidiary'}, {'name_': 'P5008', 'source': 6, 'target': 0, 'label': 'on focus list of Wikimedia project'}, {'name_': 'P463', 'source': 6, 'target': 4, 'label': 'member of'}, {'name_': 'P2652', 'source': 7, 'target': 1, 'label': 'partnership with'}, {'name_': 'P2652', 'source': 7, 'target': 4, 'label': 'partnership with'}]}