Complex sentence: There are numerous tales in which the gumiho appears, several of which can be found in the encyclopedic "Compendium of Korean Oral Literature" (한국 구비문학 대계).
Split into simpler sentences: There are numerous tales in which the gumiho appears. Several of those can be found in the encyclopedic "Compendium of Korean Oral Literature" (한국 구비문학 대계).