Complex sentence: Bela Kiss (1877-19??) was a Hungarian serial killer who is thought to have murdered at least 24 young women and attempting to pickle them in giant metal drums that he kept on his property.
Split into simpler sentences: Bela Kiss (1877-19??) was a Hungarian serial killer. He is who is thought to have murdered at least 24 young women and attempting to pickle them in giant metal drums that he kept on his property.