Complex sentence: Not wanting to give up this work, Pankow transferred to DePaul University, where he met Walter Parazaider, who recruited him to join a band named The Big Thing, which would later become Chicago.
Split into simpler sentences: Not wanting to give up this work, Pankow transferred to DePaul University. At DePaul Pankow met Walter Parazaider, who recruited him to join a band named The Big Thing--which would eventually become Chicago.