Original sentence: It was based on the Grand Baltiski, the first 4-engined aircraft designed by Igor Sikorsky.The Il'ya Muromets () was a Russian aircraft created in 1913.The Il'ya Muromets aircraft was Russia's and the world's first four-engine strategic bomber and was used to form the first dedicated strategic bombing unit
Edited sentence: It was based on the Russky Vityaz, the first 4-engined aircraft designed by Igor Sikorsky.The Il'ya Muromets () was a four-engine bomber developed in 1913.The Il'ya Muromets aircraft was the world's first four-engine bomber, and became the basis for Russia's first, dedicated strategic bombing unit