Question: Hanakoa Valley is a hanging valley located on mile 6 of which trail that has been named one of the most beautiful, and dangerous, hikes in the world?
{'answer': 'Kalalau Trail', 'supporting_facts': [['Hanakoa Valley', 0], ['Hanakoa Valley', 2], ['Kalalau Trail', 0], ['Kalalau Trail', 2]]}