Complex sentence: Both PCP-Bandera Roja and PCP-Unidad are named after their traditional press organs; the name "PCP-Unidad" is an informal designation-the official name of the PCP-Unidad is simply "Partido Comunista Peruano".
Split into simpler sentences: Both PCP-Bandera Roja and PCP-Unidad are named after their traditional press organs. The name "PCP-Unidad" is an informal designation; the official name of the PCP-Unidad is simply "Partido Comunista Peruano".