Question: what type of oysters have pearls in them
[{'answer': 'pearl oysters', 'provenance': [{'wikipedia_id': '1474511', 'title': 'Pearl hunting', 'start_paragraph_id': 3, 'start_character': 125, 'end_paragraph_id': 3, 'end_character': 138, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '1474511', 'title': 'Pearl hunting', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 344, 'bleu_score': 0.9527408887921711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4051669113335475976}, 'section': 'Section::::History.\n'}]}]