Complex sentence: Yavornytsky organized a concert for the kobzar in Yekaterinoslav, which was a resounding success and helped elevate the popularity of Kucherenko as an exceptionally talented folk singer.
Split into simpler sentences: Yavornytsky organized a concert for the kobzar in Yekaterinoslav. The concert was a resounding success and helped elevate the popularity of Kucherenko as an exceptionally talented folk singer.