Question: who played helen in the movie jack reacher
[{'answer': 'Rosamund Pike', 'provenance': [{'wikipedia_id': '32511701', 'title': 'Jack Reacher (film)', 'start_paragraph_id': 1, 'start_character': 276, 'end_paragraph_id': 1, 'end_character': 289, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]