Complex sentence: However, there is a concept much similar to the shoulder angel and devil: the qareen, which, according to Islamic literature, is a personal companion, and there are two with each individual, one from the angels and another from the jinn.
Split into simpler sentences: However, there is a concept much similar to the shoulder angel and devil which is of the Qareen. The Qareen, according to Islamic literature, is a personal companion, and there are two with each individual, one from the angels and another from the Jinn.