Question: where does the savannah river begin and end
[{'answer': 'Lake Hartwell', 'provenance': [{'wikipedia_id': '240416', 'title': 'Savannah River', 'start_paragraph_id': 1, 'start_character': 578, 'end_paragraph_id': 1, 'end_character': 591, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Atlantic Ocean', 'provenance': [{'wikipedia_id': '240416', 'title': 'Savannah River', 'start_paragraph_id': 3, 'start_character': 130, 'end_paragraph_id': 3, 'end_character': 144, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]