Question: guwahati is situated on the bank of which river
[{'answer': 'Brahmaputra River', 'provenance': [{'wikipedia_id': '839289', 'title': 'Guwahati', 'start_paragraph_id': 4, 'start_character': 39, 'end_paragraph_id': 4, 'end_character': 56, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '839289', 'title': 'Guwahati', 'start_paragraph_id': 1, 'start_character': 28, 'end_paragraph_id': 1, 'end_character': 274, 'bleu_score': 0.555979628783843, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9508515636180063861}, 'section': 'Section::::Abstract.'}]}]