Question: predators of herbivores belong to which trophic level
[{'answer': 'Level 3', 'provenance': [{'wikipedia_id': '11724761', 'title': 'Trophic level', 'start_paragraph_id': 1, 'start_character': 402, 'end_paragraph_id': 1, 'end_character': 409, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]