Original sentence: At the time over a third of Estonia's population were descendants of Russian and other Soviet economic migrants, who had been drawn to Estonia by major Soviet construction projects undertaken mostly in the Northern regions of Estonian SSR.In 1991, Estonia reinstanted its independency
Edited sentence: At the time over a third of Estonia's population were descendants of Russian and other Soviet economic migrants, who had been drawn to Estonia by its rapid post-war industrialization.In 1991, Estonian SSR declared itself independent from the Soviet Union under premier minister Edgar Savisaar and Communist president Arnold Rüütel