Complex sentence: The £40 million plans of Sainsbury's for a new superstore, opposite Tesco on the Pinguin Foods site, created an estimated 300 jobs was key in securing the future of Pinguin Foods in King's Lynn.
Split into simpler sentences: The £40 million plans of Sainsbury's for a new superstore, opposite Tesco on the Pinguin Foods site, created an estimated 300 jobs. This was the key to securing the future of Pinguin Foods in King's Lynn.