Question: something that explains a relationship in the natural world is called
[{'answer': 'scientific theory', 'provenance': [{'wikipedia_id': '198507', 'title': 'Scientific theory', 'start_paragraph_id': 1, 'start_character': 2, 'end_paragraph_id': 1, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]