Complex sentence: His father, Fazlul Quader Chowdhury, was the president of Convention Muslim League and served as the Speaker of Pakistan National Assembly and Acting President of Pakistan from time to time before the independence of Bangladesh.
Split into simpler sentences: His father, Fazlul Quader Chowdhury, was the president of Convention Muslim League. He served as the Speaker of Pakistan National Assembly and Acting President of Pakistan from time to time before the independence of Bangladesh.