Question: which region in texas has the highest elevation
[{'answer': 'The Trans - Pecos region', 'provenance': [{'wikipedia_id': '5879180', 'title': 'Geography of Texas', 'start_paragraph_id': 17, 'start_character': 364, 'end_paragraph_id': 17, 'end_character': 389, 'bleu_score': 1.0, 'section': 'Section::::Physical geography.:Mountains and basins.\n'}]}, {'provenance': [{'wikipedia_id': '5879180', 'title': 'Geography of Texas', 'start_paragraph_id': 17, 'start_character': 0, 'end_paragraph_id': 17, 'end_character': 952, 'bleu_score': 0.9182770594504871, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13038583196418394278}, 'section': 'Section::::Physical geography.:Mountains and basins.\n'}]}]