Walt Whitman Rostow
Rostow ) ( October 7 , 1916 – February 13 , 2003 ) was an American economist , professor and political theorist who served as National Security Advisor to President of the United States Lyndon B . Johnson from 1966 to 1969 . 
<triplet> Lyndon B. Johnson <subj> President of the United States <obj> position held