Complex sentence: Rentap's father and mother were Ningkan and Imbong, who had five siblings, namely Libau anak Ningkan, Jarop anak Ningkan, Ringgit anak Ningkan, Lepo Anak Ningkan and Serini anak Ningkan.
Split into simpler sentences: Rentap's father and mother were Ningkan and Imbong. They had five siblings named Libau anak Ningkan, Jarop anak Ningkan, Ringgit anak Ningkan, Lepo Anak Ningkan and Serini anak Ningkan.