Complex sentence: In 1900, John Dunlop opened a tyre factory on the opposite side of the Chester Road to where the Castle Vale housing estate now stands and gradually expanded over the next few decades to become one of the largest and most recognisable tyre factories in the world.
Split into simpler sentences: In 1900, John Dunlop opened a tyre factory on the opposite side of the Chester Road to where the Castle Vale housing estate now stands. It gradually expanded over the next few decades and is now one of the largest and most recognisable tyre factories in the world.