Question: who played the mother in how i met your mother
[{'answer': 'Cristin Milioti', 'provenance': [{'wikipedia_id': '40262098', 'title': 'The Mother (How I Met Your Mother)', 'start_paragraph_id': 1, 'start_character': 472, 'end_paragraph_id': 1, 'end_character': 487, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]