Question: who played casey in we're the millers
[{'answer': 'Emma Roberts', 'provenance': [{'wikipedia_id': '38337190', 'title': "We're the Millers", 'start_paragraph_id': 1, 'start_character': 126, 'end_paragraph_id': 1, 'end_character': 138, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]