Question: which one of the following rivers in india has been declared as the national river
[{'answer': 'Ganges', 'provenance': [{'wikipedia_id': '12448', 'title': 'Ganges', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 6, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '12448', 'title': 'Ganges', 'start_paragraph_id': 115, 'start_character': 0, 'end_paragraph_id': 115, 'end_character': 260, 'bleu_score': 0.9517713210466091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1171478012392338087}, 'section': 'Section::::Pollution and environmental concerns.\n'}]}]