Complex sentence: Easton is the location of Portland's only fuel station, and in addition to this, in early 2011, a Tesco, Portland's first major supermarket (discounting smaller convenience Co-Op stores), was opened in Easton too.
Split into simpler sentences: Easton is the location of Portland's only fuel station. In early 2011, a Tesco, Portland's first major supermarket (discounting smaller convenience Co-Op stores), was opened in Easton too.