Question: which type of marble used in taj mahal
[{'answer': 'Makrana marble', 'provenance': [{'wikipedia_id': '49277540', 'title': 'Makrana marble', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '49277540', 'title': 'Makrana marble', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 290, 'bleu_score': 0.962600167205617, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18243255134985064482}, 'section': 'Section::::Abstract.'}]}]