Complex sentence: P. C. Jersild was born in Katrineholm in a middle-class family, his first book was "Räknelära" which he released 1960 at the age of 25, although he had already been writing for 10 years at that time.
Split into simpler sentences: P. C. Jersild was born in Katrineholm in a middle-class family. His first book was "Räknelära" which he released 1960 at the age of 25, although he had already been writing for 10 years at that time.