Question: what is the meaning of siri in iphone 4s
[{'answer': 'an intelligent personal assistant'}, {'provenance': [{'wikipedia_id': '26086272', 'title': 'Siri', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 465, 'bleu_score': 0.8007352009610721, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15393275057772684103}, 'section': 'Section::::Abstract.'}]}]