Question: who showed up as winter ended and helped train the continental army
[{'answer': 'Baron Friedrich von Steuben', 'provenance': [{'wikipedia_id': '10778278', 'title': 'Valley Forge', 'start_paragraph_id': 38, 'start_character': 523, 'end_paragraph_id': 38, 'end_character': 550, 'bleu_score': 1.0, 'section': 'Section::::Organizational challenges.:Training.\n'}]}]