Complex sentence: Homebase was founded by the supermarket chain Sainsbury's and Belgian retailer GB-Inno-BM in 1979 as Sainsbury's Homebase, to bring a supermarket-style layout to the British Do It Yourself (DIY) market.
Split into simpler sentences: Homebase was founded by the supermarket chain Sainsbury's and Belgian retailer GB-Inno-BM in 1979, as Sainsbury's Homebase. This was to bring a supermarket-style layout to the British Do It Yourself (DIY) market.