Question: where would the oldest oceanic crust be found
[{'answer': 'away from the ridges', 'provenance': [{'wikipedia_id': '981252', 'title': 'Oceanic crust', 'start_paragraph_id': 13, 'start_character': 356, 'end_paragraph_id': 13, 'end_character': 376, 'bleu_score': 1.0, 'section': 'Section::::Composition.:Life cycle.\n'}]}, {'provenance': [{'wikipedia_id': '981252', 'title': 'Oceanic crust', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 376, 'bleu_score': 0.9274581800092581, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 746536462476023934}, 'section': 'Section::::Composition.:Life cycle.\n'}]}]