Question: who is carla in 50 shades of grey
[{'answer': 'Jennifer Ehle', 'provenance': [{'wikipedia_id': '40218034', 'title': 'Fifty Shades of Grey (film)', 'start_paragraph_id': 38, 'start_character': 29, 'end_paragraph_id': 38, 'end_character': 42, 'bleu_score': 1.0, 'section': 'Section::::Production.:Casting.\n'}]}, {'provenance': [{'wikipedia_id': '40218034', 'title': 'Fifty Shades of Grey (film)', 'start_paragraph_id': 16, 'start_character': 0, 'end_paragraph_id': 16, 'end_character': 60, 'bleu_score': 0.7598356856515921, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6069825347374793553}, 'section': 'Section::::Cast.\n'}]}]