Question: in the hubble scheme for classifying galaxies what type of galaxy is the milky way
[{'answer': 'SBb', 'provenance': [{'wikipedia_id': '45145', 'title': 'Hubble sequence', 'start_paragraph_id': 21, 'start_character': 42, 'end_paragraph_id': 21, 'end_character': 45, 'bleu_score': 1.0, 'section': 'Section::::Classes of galaxies.:Spirals.\n'}]}, {'answer': 'barred spiral with well - defined arms'}]