Question: who won the last season of project runway
[{'answer': 'Erin Robertson', 'provenance': [{'wikipedia_id': '51277348', 'title': 'Project Runway (season 15)', 'start_paragraph_id': 32, 'start_character': 12, 'end_paragraph_id': 32, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Designer Progress.\n'}]}]