Complex sentence: The expansion of the textile industry in Massachusetts forced managers to recruit female Irish immigrants, although Yankee women continued to dominated Lowell's textile workforce until the 1880s, by the 1850s, many aspects of the Lowell System.
Split into simpler sentences: The expansion of the textile industry in Massachusetts forced managers to recruit female Irish immigrants. Although Yankee women dominated Lowell's textile workforce until the 1880s, by the 1850s, many aspects of the Lowell System.