Question: what is the main religion in south korea
[{'answer': 'Christianity', 'provenance': [{'wikipedia_id': '23747240', 'title': 'Religion in South Korea', 'start_paragraph_id': 1, 'start_character': 515, 'end_paragraph_id': 1, 'end_character': 527, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]