Complex sentence: Woolworths Group PLC was a listed British company that owned the high-street retail chain, Woolworths, as well as other companies such as the entertainment distributor Entertainment UK and book and resource distributor Bertram Books.
Split into simpler sentences: Woolworths Group plc was a listed British company that owned the high-street retail chain, Woolworths. It also owned other companies such as the entertainment distributor Entertainment UK, and book and resource distributor Bertram Books.