Complex sentence: The museum was established in 1978 by Donald Joseph Sidebottom a wealthy Fylde Coast industrialist who had previously kept his large collection of automobile ephemera in a large barn in Lancashire.
Split into simpler sentences: The museum was established in 1978 by a wealthy Fylde Coast industrialist, Donald Joseph Sidebottom. Don Sidebottom had previously kept his large collection of automobile ephemera in a large barn in Lancashire.