Complex sentence: The administrative boundaries of Worcestershire, England have been fluid for over 150 years since the first major changes in 1844, although the continual expansion of Birmingham and the Black Country during and after the Industrial Revolution altered the county map considerably.
Split into simpler sentences: The administrative boundaries of Worcestershire, England have been fluid for over 150 years since the first major changes in 1844. The expansion of Birmingham and the Black Country during and after the Industrial Revolution also altered the county map considerably.