Question: what is the biggest continent by land mass
[{'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.'}]}, {'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': 4496084034303690641}, 'section': 'Section::::Abstract.'}]}]