Question: when did the von trapp family leave austria
[{'answer': '1938', 'provenance': [{'wikipedia_id': '62582', 'title': 'Georg von Trapp', 'start_paragraph_id': 26, 'start_character': 132, 'end_paragraph_id': 26, 'end_character': 136, 'bleu_score': 1.0, 'section': 'Section::::Departure from Austria and later life.\n'}]}, {'provenance': [{'wikipedia_id': '62582', 'title': 'Georg von Trapp', 'start_paragraph_id': 26, 'start_character': 0, 'end_paragraph_id': 26, 'end_character': 893, 'bleu_score': 0.9713492876971751, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3304805935074018362}, 'section': 'Section::::Departure from Austria and later life.\n'}]}]