Question: when was washington appointed general of the continental army
[{'answer': 'June 15 , 1775', 'provenance': [{'wikipedia_id': '168210', 'title': 'Continental Army', 'start_paragraph_id': 6, 'start_character': 3, 'end_paragraph_id': 6, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Origins.\n'}]}, {'provenance': [{'wikipedia_id': '168210', 'title': 'Continental Army', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 202, 'bleu_score': 0.9364250605898111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10262876223223186263}, 'section': 'Section::::Origins.\n'}]}]