Question: the altair is considered the first successful personal computer. who developed it
[{'answer': '1974', 'provenance': [{'wikipedia_id': '2806149', 'title': 'Ed Roberts (computer engineer)', 'start_paragraph_id': 2, 'start_character': 65, 'end_paragraph_id': 2, 'end_character': 69, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2806149', 'title': 'Ed Roberts (computer engineer)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 615, 'bleu_score': 0.629602457176832, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3594565677276358565}, 'section': 'Section::::Abstract.'}]}]