Question: the 38th parallel in korea is an example of a(n)
[{'answer': 'circle of latitude', 'provenance': [{'wikipedia_id': '23836235', 'title': '38th parallel north', 'start_paragraph_id': 1, 'start_character': 29, 'end_paragraph_id': 1, 'end_character': 47, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '23836235', 'title': '38th parallel north', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 307, 'bleu_score': 0.962600167205617, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10589921482618805172}, 'section': 'Section::::Abstract.'}]}]