Complex sentence: Work on the project was started at WSK PZL in 1973 in the team of Stanisław Kamiński, the Sokol made its first flight on November 16 1979, and has since been certificated in Poland, Russia, the US and Germany.
Split into simpler sentences: Work on the project was started at WSK PZL in 1973 by the team of Stanisław Kamiński. The Sokol made its first flight on November 16 1979, and has since been certificated in Poland, Russia, the US and Germany.