Question: when does brennan get pregnant the first time
[{'answer': 'season six finale', 'provenance': [{'wikipedia_id': '11582552', 'title': 'Temperance "Bones" Brennan', 'start_paragraph_id': 24, 'start_character': 218, 'end_paragraph_id': 24, 'end_character': 235, 'bleu_score': 1.0, 'section': 'Section::::Character history.:Family and early life.\n'}]}, {'provenance': [{'wikipedia_id': '11582552', 'title': 'Temperance "Bones" Brennan', 'start_paragraph_id': 24, 'start_character': 0, 'end_paragraph_id': 24, 'end_character': 309, 'bleu_score': 0.9663744727315161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2143278346861669985}, 'section': 'Section::::Character history.:Family and early life.\n'}]}]