Question: what geographic feature covers most of the arabian peninsula
[{'answer': 'desert', 'provenance': [{'wikipedia_id': '47858', 'title': 'Arabian Peninsula', 'start_paragraph_id': 6, 'start_character': 47, 'end_paragraph_id': 6, 'end_character': 53, 'bleu_score': 1.0, 'section': 'Section::::Geography.\n'}]}, {'provenance': [{'wikipedia_id': '47858', 'title': 'Arabian Peninsula', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 281, 'bleu_score': 0.8323978179356301, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13175807131181221774}, 'section': 'Section::::Geography.\n'}]}]