Question: who built the world's first binary digital computer z1
[{'answer': 'Konrad Zuse', 'provenance': [{'wikipedia_id': '1587753', 'title': 'Z1 (computer)', 'start_paragraph_id': 1, 'start_character': 45, 'end_paragraph_id': 1, 'end_character': 56, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1587753', 'title': 'Z1 (computer)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 247, 'bleu_score': 0.845201820370708, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7618676332180432703}, 'section': 'Section::::Abstract.'}]}]