Question: In what year did the eruption occur that laid down the lava upon which a famous forest visible from the Tenjō-Yama Park Mt. Kachi Kachi Ropeway?
{'answer': '864 CE', 'supporting_facts': [['Tenjō-Yama Park Mt. Kachi Kachi Ropeway', 0], ['Tenjō-Yama Park Mt. Kachi Kachi Ropeway', 4], ['Aokigahara', 0]]}