Question: when did touch screen phones first come out
[{'answer': '1992', 'provenance': [{'wikipedia_id': '167079', 'title': 'Smartphone', 'start_paragraph_id': 6, 'start_character': 159, 'end_paragraph_id': 6, 'end_character': 163, 'bleu_score': 1.0, 'section': 'Section::::History.:Forerunner.\n'}]}, {'provenance': [{'wikipedia_id': '167079', 'title': 'Smartphone', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 870, 'bleu_score': 0.9601843545193891, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5913565494670805043}, 'section': 'Section::::History.:Forerunner.\n'}]}]