Question: who is the actress that plays emma in once upon a time
[{'answer': 'Jennifer Marie Morrison', 'provenance': [{'wikipedia_id': '1941975', 'title': 'Jennifer Morrison', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1941975', 'title': 'Jennifer Morrison', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 554, 'bleu_score': 0.8835183362248661, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4047041493768308635}, 'section': 'Section::::Abstract.'}]}]