Question: The Sagittarius Dwarf Spheroidal Galaxy, a loop-shaped galaxy of the Milky Way, is which type of the three main classes of galaxy originally described by Edwin Hubble in "The Realm of the Nebulae?"
{'answer': 'An elliptical galaxy', 'supporting_facts': [['Sagittarius Dwarf Spheroidal Galaxy', 0], ['Elliptical galaxy', 0], ['Elliptical galaxy', 2]]}