Question: how long is the ferry from seattle to bainbridge island
[{'answer': '8.6 miles', 'provenance': [{'wikipedia_id': '31957736', 'title': 'Seattle–Bainbridge ferry', 'start_paragraph_id': 3, 'start_character': 20, 'end_paragraph_id': 3, 'end_character': 29, 'bleu_score': 1.0, 'section': 'Section::::Description.\n'}]}]