Complex sentence: By 1963, the leading Bengali statesmen who played a key role in Pakistan's founding-Huq, Suhrawardy, Nazimuddin and Bogra-were dead and the Awami League elected Sheikh Mujibur Rahman (Mujib) as its president.
Split into simpler sentences: By 1963, the leading Bengali statesmen who played a key role in Pakistan's founding, including Huq, Suhrawardy, Nazimuddin and Bogra, were dead. The same year, the Awami League elected Sheikh Mujibur Rahman (Mujib) as its president.