Question: what is the hubble classification of the milky way galaxy
[{'answer': 'SBb or SBc', 'provenance': [{'wikipedia_id': '45145', 'title': 'Hubble sequence', 'start_paragraph_id': 21, 'start_character': 42, 'end_paragraph_id': 21, 'end_character': 52, 'bleu_score': 1.0, 'section': 'Section::::Classes of galaxies.:Spirals.\n'}]}, {'provenance': [{'wikipedia_id': '45145', 'title': 'Hubble sequence', 'start_paragraph_id': 21, 'start_character': 0, 'end_paragraph_id': 21, 'end_character': 102, 'bleu_score': 0.9021315316859231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11595106587737644358}, 'section': 'Section::::Classes of galaxies.:Spirals.\n'}]}]