Complex sentence: This series of instruments were made until 1954 by maker Ivan Hladlin, who worked with makers Oleksander Shulaikovsky, Mykola Martynchuk and Oleksiy Kilochytsky.
Split into simpler sentences: This series of instruments were made until 1954 by maker Ivan Hladlin. Hladlin worked with makers Oleksander Shulaikovsky, Mykola Martynchuk and Oleksiy Kilochytsky.