Complex sentence: Tryambak Bapuji Thombre (13 August 1890--05 May 1918) was an Indian Marathi poet, whose pen name was "Balkavi", also spelled as "Baalkavi" or "Baal-kavi".
Split into simpler sentences: Tryambak Bapuji Thombre (13 August 1890--05 May 1918) was an Indian Marathi poet. He used the pen name "Balkavi", which is also spelled as "Baalkavi" or "Baal-kavi".