Complex sentence: It was established in 1928 and was held in Wilno (now Vilnius, Lithuania), and was designed to attract businesses from the area of northeastern Poland, as well as Lithuania, Latvia and the Soviet Union.
Split into simpler sentences: It was established in 1928 and held in Wilno (now Vilnius, Lithuania). The Fair was designed to attract businesses from the area of northeastern Poland, as well as Lithuania, Latvia and the Soviet Union.