Sentence:  Nakamura ( ' 58 ) , Verloop ( ' 48 ) , Marchand , Gilroy and Watson ( ' 50 ) , von Hayek ( ' 53 ) , and Tobin ( ' 52 ) have all claimed their normal but relatively nonfunctional <WSD>existence</WSD> in the human being . 
Meaning of the word marked with <WSD> tags:  the state or fact of existing