Question: where can the oldest oceanic crust be found
[{'answer': 'the eastern Mediterranean Sea', 'provenance': [{'wikipedia_id': '981252', 'title': 'Oceanic crust', 'start_paragraph_id': 17, 'start_character': 152, 'end_paragraph_id': 17, 'end_character': 181, 'bleu_score': 1.0, 'section': 'Section::::Composition.:Life cycle.\n'}]}, {'provenance': [{'wikipedia_id': '981252', 'title': 'Oceanic crust', 'start_paragraph_id': 17, 'start_character': 0, 'end_paragraph_id': 17, 'end_character': 271, 'bleu_score': 0.9603762111511761, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9322408499728311825}, 'section': 'Section::::Composition.:Life cycle.\n'}]}]