Complex sentence: The peryton is a fictional animal combining the physical features of a stag and a bird, presumably originating in Jorge Luis Borges' "Book of Imaginary Beings," although he refers to a lost medieval manuscript as a source.
Split into simpler sentences: The peryton is a fictional animal combining the physical features of a stag and a bird. The name may have originated in Jorge Luis Borges' "Book of Imaginary Beings," although he refers to a lost medieval manuscript as a source.