Question: when was the roper logan tierney model developed
[{'answer': '1980', 'provenance': [{'wikipedia_id': '1687355', 'title': 'Roper–Logan–Tierney model of nursing', 'start_paragraph_id': 1, 'start_character': 71, 'end_paragraph_id': 1, 'end_character': 75, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1687355', 'title': 'Roper–Logan–Tierney model of nursing', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 394, 'bleu_score': 0.9318557434050331, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6104470431786735135}, 'section': 'Section::::Abstract.'}]}]