Question: who introduced the dual system of administration in bengal
[{'answer': 'Robert Clive', 'provenance': [{'wikipedia_id': '2553921', 'title': 'Nawabs of Bengal and Murshidabad', 'start_paragraph_id': 18, 'start_character': 9, 'end_paragraph_id': 18, 'end_character': 21, 'bleu_score': 1.0, 'section': "Section::::History during the Nawab's rule.:Emergence of the Nawab Nizam of Bengal.\n"}]}, {'provenance': [{'wikipedia_id': '2553921', 'title': 'Nawabs of Bengal and Murshidabad', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 1306, 'bleu_score': 0.991130601392713, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2682568947655057853}, 'section': "Section::::History during the Nawab's rule.:Emergence of the Nawab Nizam of Bengal.\n"}]}]