Question: what is the significance of the sahara desert
[{'answer': 'the largest hot desert', 'provenance': [{'wikipedia_id': '325363', 'title': 'Sahara', 'start_paragraph_id': 1, 'start_character': 93, 'end_paragraph_id': 1, 'end_character': 115, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'the third largest desert in the world after Antarctica and the Arctic'}, {'answer': 'the largest hot desert and the third largest desert in the world after Antarctica and the Arctic'}, {'provenance': [{'wikipedia_id': '325363', 'title': 'Sahara', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 338, 'bleu_score': 0.5748804753984961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2672483860622143095}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '325363', 'title': 'Sahara', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2672483860622143095}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '325363', 'title': 'Sahara', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ["The Sahara (, ; , ', 'the Great Desert') is a desert located on the African continent. It is the largest hot desert in the world, and the third largest desert overall after Antarctica and the Arctic.", 'It is the largest hot desert in the world, and the third largest desert overall after Antarctica and the Arctic.', 'The Sahara (, ; , \', \'the Great Desert\') is a desert located on the African continent. It is the largest hot desert in the world, and the third largest desert overall after Antarctica and the Arctic. Its area of is comparable to the area of China or the United States. The name \'Sahara\' is derived from a dialectal Arabic word for "desert", \' ( ).']}}]}]