Question: what are the names of the earth's seven continents from largest to smallest
[{'answer': 'Asia', 'provenance': [{'wikipedia_id': '19630739', 'title': 'Continent', 'start_paragraph_id': 1, 'start_character': 296, 'end_paragraph_id': 1, 'end_character': 300, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Africa', 'provenance': [{'wikipedia_id': '19630739', 'title': 'Continent', 'start_paragraph_id': 1, 'start_character': 302, 'end_paragraph_id': 1, 'end_character': 308, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'North America', 'provenance': [{'wikipedia_id': '19630739', 'title': 'Continent', 'start_paragraph_id': 1, 'start_character': 310, 'end_paragraph_id': 1, 'end_character': 323, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'South America', 'provenance': [{'wikipedia_id': '19630739', 'title': 'Continent', 'start_paragraph_id': 1, 'start_character': 325, 'end_paragraph_id': 1, 'end_character': 338, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Antarctica', 'provenance': [{'wikipedia_id': '19630739', 'title': 'Continent', 'start_paragraph_id': 1, 'start_character': 340, 'end_paragraph_id': 1, 'end_character': 350, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Europe', 'provenance': [{'wikipedia_id': '19630739', 'title': 'Continent', 'start_paragraph_id': 1, 'start_character': 352, 'end_paragraph_id': 1, 'end_character': 358, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Australia', 'provenance': [{'wikipedia_id': '19630739', 'title': 'Continent', 'start_paragraph_id': 1, 'start_character': 364, 'end_paragraph_id': 1, 'end_character': 373, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19630739', 'title': 'Continent', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 373, 'bleu_score': 0.687399133448926, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16480816067684193283}, 'section': 'Section::::Abstract.'}]}]