Question: combined flow of shilabati and dwarakeswar is known as
[{'answer': 'The Rupnarayan River', 'provenance': [{'wikipedia_id': '2360834', 'title': 'Rupnarayan River', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2360834', 'title': 'Rupnarayan River', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 697, 'bleu_score': 0.983537688954433, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9344232765128588361}, 'section': 'Section::::Abstract.'}]}]