Question: android operating system was acquired by google in
[{'answer': 'July 2005', 'provenance': [{'wikipedia_id': '12610483', 'title': 'Android (operating system)', 'start_paragraph_id': 8, 'start_character': 3, 'end_paragraph_id': 8, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '12610483', 'title': 'Android (operating system)', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 694, 'bleu_score': 0.9826823455989031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9444786764938486688}, 'section': 'Section::::History.\n'}]}]