Question: who is the actress who plays eleven on stranger things
[{'answer': 'Millie Bobby Brown', 'provenance': [{'wikipedia_id': '51137169', 'title': 'Millie Bobby Brown', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '51137169', 'title': 'Millie Bobby Brown', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 295, 'bleu_score': 0.720129500879599, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15273407250476527228}, 'section': 'Section::::Abstract.'}]}]