Question: when were there three popes at the same time
[{'answer': 'from 1378 to 1417', 'provenance': [{'wikipedia_id': '543939', 'title': 'Western Schism', 'start_paragraph_id': 1, 'start_character': 137, 'end_paragraph_id': 1, 'end_character': 154, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '543939', 'title': 'Western Schism', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 474, 'bleu_score': 0.8003998072819141, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4967350406640143117}, 'section': 'Section::::Abstract.'}]}]