Question: where does the yenisei river begin and end
[{'answer': 'Mungaragiyn - Gol'}, {'answer': 'Yenisei Gulf', 'provenance': [{'wikipedia_id': '56870', 'title': 'Yenisei River', 'start_paragraph_id': 1, 'start_character': 423, 'end_paragraph_id': 1, 'end_character': 435, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]