Question: how long does it take for a blue whale to give birth
[{'answer': '10 to 12 months', 'provenance': [{'wikipedia_id': '4925', 'title': 'Blue whale', 'start_paragraph_id': 32, 'start_character': 114, 'end_paragraph_id': 32, 'end_character': 129, 'bleu_score': 1.0, 'section': 'Section::::Behaviour.:Life history.\n'}]}, {'provenance': [{'wikipedia_id': '4925', 'title': 'Blue whale', 'start_paragraph_id': 32, 'start_character': 0, 'end_paragraph_id': 32, 'end_character': 486, 'bleu_score': 0.778137565238696, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2739325209369633824}, 'section': 'Section::::Behaviour.:Life history.\n'}]}]