['The', 'roller', 'gin', 'has', 'revolutionized', 'the', 'cotton', 'industry', 'by', 'efficiently', 'cleaning', 'cotton', 'from', 'seeds', '.', 'Its', 'design', 'features', 'rollers', 'that', 'run', 'against', 'sharp', 'knives', ',', 'allowing', 'for', 'a', 'thorough', 'separation', 'of', 'the', 'cotton', 'fibers', '.', 'Before', 'the', 'introduction', 'of', 'the', 'roller', 'gin', ',', 'workers', 'used', 'traditional', 'methods', 'that', 'were', 'labor-intensive', 'and', 'less', 'effective', '.', 'The', 'churka', ',', 'another', 'name', 'for', 'the', 'roller', 'gin', ',', 'exemplifies', 'the', 'advancements', 'in', 'textile', 'machinery', 'that', 'have', 'improved', 'productivity', 'in', 'cotton', 'processing', '.']
[[1, 2, 'Textile Machinery'], [55, 55, 'Textile Machinery']]