Question: ajanta caves is made up of which stone
[{'answer': 'flood basalt rock', 'provenance': [{'wikipedia_id': '2642', 'title': 'Ajanta Caves', 'start_paragraph_id': 25, 'start_character': 28, 'end_paragraph_id': 25, 'end_character': 45, 'bleu_score': 1.0, 'section': 'Section::::Architecture and sculpture.:Site.\n'}]}, {'provenance': [{'wikipedia_id': '2642', 'title': 'Ajanta Caves', 'start_paragraph_id': 25, 'start_character': 0, 'end_paragraph_id': 25, 'end_character': 726, 'bleu_score': 0.983804329702269, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3208976474431779880}, 'section': 'Section::::Architecture and sculpture.:Site.\n'}]}]