Question: name of the nokia mobile phone operating system
[{'answer': 'Symbian', 'provenance': [{'wikipedia_id': '14260687', 'title': 'Mobile operating system', 'start_paragraph_id': 435, 'start_character': 11, 'end_paragraph_id': 435, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Discontinued software platforms.:Closed source.:Windows Phone.\n'}]}, {'provenance': [{'wikipedia_id': '14260687', 'title': 'Mobile operating system', 'start_paragraph_id': 436, 'start_character': 0, 'end_paragraph_id': 436, 'end_character': 401, 'bleu_score': 0.804159864478838, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6289947630376142087}, 'section': 'Section::::Discontinued software platforms.:Closed source.:Symbian.\n'}]}]