Question: what are the different sizes of macbook pro
[{'answer': '13 - inch'}, {'answer': '15 - inch'}, {'answer': '17 - inch'}, {'provenance': [{'wikipedia_id': '3677824', 'title': 'MacBook Pro', 'start_paragraph_id': 21, 'start_character': 0, 'end_paragraph_id': 21, 'end_character': 1443, 'bleu_score': 0.752921226447943, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4697408805175546118}, 'section': 'Section::::Second generation (Unibody).:Updates.\n'}]}]