Question: when was the first touch screen mobile phone invented
[{'answer': '1994', 'provenance': [{'wikipedia_id': '167079', 'title': 'Smartphone', 'start_paragraph_id': 6, 'start_character': 310, 'end_paragraph_id': 6, 'end_character': 314, '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': 17924826961639778925}, 'section': 'Section::::History.:Forerunner.\n'}]}]