Complex sentence: Pekinška Patka's roots are found in another band called Trafo, a short-lived group, formed in 1976, featuring Nebojša Čonkić on vocals and Sreten Kovačević on guitar, performing cover versions of rock standards by the Rolling Stones and Santana.
Split into simpler sentences: Pekinška Patka's roots are found in another band called Trafo. That short-lived group, formed in 1976, featuring Nebojša Čonkić on vocals and Sreten Kovačević on guitar, performed cover versions of rock standards by the Rolling Stones and Santana.