Question: what is the name of the canal that separates central and south america
[{'answer': 'Panama Canal', 'provenance': [{'wikipedia_id': '1404472', 'title': 'Isthmus of Panama', 'start_paragraph_id': 1, 'start_character': 228, 'end_paragraph_id': 1, 'end_character': 240, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1404472', 'title': 'Isthmus of Panama', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 374, 'bleu_score': 0.6990775696236541, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4711119759948712254}, 'section': 'Section::::Abstract.'}]}]