Question: where did most unskilled laborers work in the industrial revolution
[{'answer': 'factory', 'provenance': [{'wikipedia_id': '1428809', 'title': 'Factory system', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 11, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]