Complex sentence: Parti Rakyat Bersatu (UPP) as a new formed political party is pro-Barisan Nasional (BN) in Sarawak is a splinter party of Sarawak United People's Party (SUPP) set-up by its disgruntled leaders.
Split into simpler sentences: Parti Rakyat Bersatu (UPP) as a new formed political party is pro-Barisan Nasional (BN) di Sarawak. UPP ia a splinter party of Sarawak United People's Party (SUPP) set-up by disgruntled leaders.