Question: who played little eponine in les miserables movie
[{'answer': 'Samantha Barks', 'provenance': [{'wikipedia_id': '33029735', 'title': 'Les Misérables (2012 film)', 'start_paragraph_id': 4, 'start_character': 360, 'end_paragraph_id': 4, 'end_character': 374, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]