Question: Due to concern in regards to the visual appearance of a sacred mountain to Native Hawaiians, the Thirty Meter Telescope has been considered to be built in which alternative site in Spain?
{'answer': 'Roque de los Muchachos Observatory', 'supporting_facts': [['Opposition to the Mauna Kea Observatories', 2], ['Opposition to the Mauna Kea Observatories', 5], ['Thirty Meter Telescope', 4]]}