Question: Clark Clifford was an American lawyer who served as political adviser to which president known for launching the Marshall Plan?
Sentence (from "Clark Clifford"): His official government positions were White House Counsel (1946–1950), Chairman of the President's Intelligence Advisory Board (1963–1968), and Secretary of Defense (1968–1969); Clifford was also influential in his role as an unofficial, informal presidential adviser in various issues.
Relevant evidence: No