Question: who began the mass printing of bibles five centuries ago
[{'answer': 'Johannes Gutenberg', 'provenance': [{'wikipedia_id': '286327', 'title': 'Gutenberg Bible', 'start_paragraph_id': 1, 'start_character': 449, 'end_paragraph_id': 1, 'end_character': 467, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '286327', 'title': 'Gutenberg Bible', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 703, 'bleu_score': 0.5839136584526711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13054267708926663436}, 'section': 'Section::::Abstract.'}]}]