Complex sentence: The kobza became extinct early in the 20th century, but currently there is a revival of kobza playing in Ukraine, due to the efforts of the "Kobzar Guild" in Kiev and Kharkiv.
Split into simpler sentences: The kobza became extinct early in the 20th century. Currently there is a revival of kobza playing in Ukraine, due to the efforts of the "Kobzar Guild" in Kiev and Kharkiv.