Ivan Supek
Ivan Supek ( 8 April 1915 – 5 March 2007 ) was a Croatian physicist , philosopher , writer , playwright , peace activist and humanist . 
<triplet> Ivan Supek <subj> 8 April 1915 <obj> date of birth <subj> 5 March 2007 <obj> date of death <triplet> playwright <subj> writer <obj> subclass of