Text: To counter a perceived communist threat from the Soviet Union, the US quickly set to work reconstructing the economy by transforming Japan's institutions and devising a new pacifist constitution.
Entailment: The transformation of Japan's institutions came from the US reconstructing the economy, because of a perceived threat from the Soviet Union.
Contradiction: I took the US a long time to start working on the reconstruction of Japan's institutions and constitution after the Soviet Unions' threat.