Question: who does lauren cohan play in the walking dead
[{'answer': 'Maggie Greene', 'provenance': [{'wikipedia_id': '10531315', 'title': 'Lauren Cohan', 'start_paragraph_id': 1, 'start_character': 175, 'end_paragraph_id': 1, 'end_character': 188, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]