Complex sentence: She then moved to Mexico City never to go back to Rosario again, where she worked at the radio station XEW, where she was discovered by famed singer Matilde "La Torcacita" Sanchez.
Split into simpler sentences: She then moved to Mexico City never to go back to Rosario again, where she worked at the radio station XEW. She was discovered by famed singer Matilde "La Torcacita" Sanchez.