Question: when did the marine corps start the crucible
[{'answer': '1996', 'provenance': [{'wikipedia_id': '10491849', 'title': 'United States Marine Corps Recruit Training', 'start_paragraph_id': 88, 'start_character': 155, 'end_paragraph_id': 88, 'end_character': 159, 'bleu_score': 1.0, 'section': 'Section::::Training Schedule.:Phase 4.:Week 10-The Crucible.\n'}]}, {'provenance': [{'wikipedia_id': '10491849', 'title': 'United States Marine Corps Recruit Training', 'start_paragraph_id': 88, 'start_character': 0, 'end_paragraph_id': 88, 'end_character': 1140, 'bleu_score': 0.6703510559013871, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7815783671382818770}, 'section': 'Section::::Training Schedule.:Phase 4.:Week 10-The Crucible.\n'}]}]