Question: name the continent that is south of north america
[{'answer': 'South America', 'provenance': [{'wikipedia_id': '21139', 'title': 'North America', 'start_paragraph_id': 1, 'start_character': 344, 'end_paragraph_id': 1, 'end_character': 357, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '21139', 'title': 'North America', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 379, 'bleu_score': 0.970795021215021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5422063943966016958}, 'section': 'Section::::Abstract.'}]}]