['The', 'mule', 'spinning', 'frame', 'is', 'a', 'pivotal', 'invention', 'in', 'the', 'history', 'of', 'textile', 'production', ',', 'featuring', 'a', 'crucial', 'component', 'known', 'as', 'the', 'headstock', '.', 'This', 'driving', 'and', 'controlling', 'machine', 'of', 'the', 'mule', 'spinning', 'frame', 'ensures', 'the', 'proper', 'operation', 'of', 'the', 'entire', 'system', ',', 'allowing', 'for', 'the', 'efficient', 'spinning', 'of', 'fibers', 'into', 'yarn', '.', 'The', 'design', 'of', 'the', 'headstock', 'has', 'evolved', 'over', 'the', 'years', ',', 'improving', 'the', 'overall', 'functionality', 'and', 'reliability', 'of', 'the', 'spinning', 'process', '.']
[[22, 22, 'Textile Machinery'], [1, 3, 'Textile Machinery']]