Question: what are the landlocked countries in south america
[{'answer': 'Bolivia', 'provenance': [{'wikipedia_id': '297503', 'title': 'Landlocked country', 'start_paragraph_id': 32, 'start_character': 495, 'end_paragraph_id': 32, 'end_character': 502, 'bleu_score': 1.0, 'section': 'Section::::Significance.:Political repercussions.\n'}]}, {'answer': 'Paraguay', 'provenance': [{'wikipedia_id': '297503', 'title': 'Landlocked country', 'start_paragraph_id': 32, 'start_character': 481, 'end_paragraph_id': 32, 'end_character': 489, 'bleu_score': 1.0, 'section': 'Section::::Significance.:Political repercussions.\n'}]}]