Question: what was the first practical and affordable home computer
[{'answer': 'the Altair 8800', 'provenance': [{'wikipedia_id': '25122906', 'title': 'Home computer', 'start_paragraph_id': 8, 'start_character': 139, 'end_paragraph_id': 8, 'end_character': 154, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}]