Complex sentence: Lee was one of the last People's Action Party (PAP) old guard office holders still alive when he passed on, other than retired PAP veterans Othman Wok, Jek Yeun Thong, Chor Yeok Eng and Ong Pang Boon.
Split into simpler sentences: Lee was one of the last People's Action Party (PAP) old guard office holders still alive. Other PAP members of his generation include Othman Wok, Jek Yeun Thong, Chor Yeok Eng and Ong Pang Boon.