Question: who gets vivien pregnant in american horror story
[{'answer': 'Ben', 'provenance': [{'wikipedia_id': '34037378', 'title': 'Birth (American Horror Story)', 'start_paragraph_id': 5, 'start_character': 277, 'end_paragraph_id': 5, 'end_character': 280, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'answer': 'Tate', 'provenance': [{'wikipedia_id': '34037378', 'title': 'Birth (American Horror Story)', 'start_paragraph_id': 3, 'start_character': 93, 'end_paragraph_id': 3, 'end_character': 97, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]