Question: when did lumbering and mining become important in michigan
[{'answer': '1855', 'provenance': [{'wikipedia_id': '3751434', 'title': 'History of Michigan', 'start_paragraph_id': 3, 'start_character': 133, 'end_paragraph_id': 3, 'end_character': 137, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3751434', 'title': 'History of Michigan', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 483, 'bleu_score': 0.9731482306711111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11532083111760589848}, 'section': 'Section::::Abstract.'}]}]