Question: when did pangea begin to break into smaller fragments
[{'answer': 'about 175 million years ago', 'provenance': [{'wikipedia_id': '19654281', 'title': 'Pangaea', 'start_paragraph_id': 1, 'start_character': 215, 'end_paragraph_id': 1, 'end_character': 242, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19654281', 'title': 'Pangaea', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 517, 'bleu_score': 0.9451526628827591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4312850635519648206}, 'section': 'Section::::Abstract.'}]}]