Question: the central processing unit cpu is a type of
[{'answer': 'microprocessor', 'provenance': [{'wikipedia_id': '5218', 'title': 'Central processing unit', 'start_paragraph_id': 3, 'start_character': 21, 'end_paragraph_id': 3, 'end_character': 35, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5218', 'title': 'Central processing unit', 'start_paragraph_id': 22, 'start_character': 0, 'end_paragraph_id': 22, 'end_character': 782, 'bleu_score': 0.9817332376369081, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1055672441690941419}, 'section': 'Section::::History.:Microprocessors.\n'}]}]