Complex sentence: Khandakar Kawkabum Munir Saad, known as Saad Khandakar is a Bangladeshi born multilingual singer and an International Exchange Alumnus of the US Department of State.
Split into simpler sentences: Khandakar Kawkabum Munir Saad, known when performing as Saad Khandakar, is a Bangladeshi singer who performs in multiple languages. He is also an International Exchange Alumnus of the US Department of State.