Question: who plays arnie in what's eating gilbert grape
[{'answer': 'Leonardo DiCaprio', 'provenance': [{'wikipedia_id': '656608', 'title': "What's Eating Gilbert Grape", 'start_paragraph_id': 1, 'start_character': 154, 'end_paragraph_id': 1, 'end_character': 171, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]