Question: what kind of meat is tacos al pastor
[{'answer': 'pork', 'provenance': [{'wikipedia_id': '2546911', 'title': 'Al pastor', 'start_paragraph_id': 1, 'start_character': 364, 'end_paragraph_id': 1, 'end_character': 368, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2546911', 'title': 'Al pastor', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 469, 'bleu_score': 0.740469342928956, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6990956611651348642}, 'section': 'Section::::Abstract.'}]}]