Question: when did the civilian conservation corps start and end
[{'answer': '1933 to 1942', 'provenance': [{'wikipedia_id': '7821', 'title': 'Civilian Conservation Corps', 'start_paragraph_id': 1, 'start_character': 100, 'end_paragraph_id': 1, 'end_character': 112, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7821', 'title': 'Civilian Conservation Corps', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1040, 'bleu_score': 0.896173985255273, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9301870882266762280}, 'section': 'Section::::Abstract.'}]}]