anchor: It is instructive to note that the 1947 legislation creating DOD was further changed by the Congress in 1949, 1953, 1958, and 1986 in order to improve the department's structural effectiveness.
positive: The 1947 legislation that created DOD was changed by Congress multiple times between 1949 and 1986.
negative: The 1947 legislation that created DOD was never changed by Congress.