Question: who has the most number of nuclear weapons
[{'answer': 'Russia', 'provenance': [{'wikipedia_id': '400821', 'title': 'List of states with nuclear weapons', 'start_paragraph_id': 1, 'start_character': 297, 'end_paragraph_id': 1, 'end_character': 303, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]