Which country, after its Act of Union agreement expired, held a four-day plebiscite in 1944 and became an independent republic on 17 June 1944, with Sveinn Björnsson as the first President?
Which country became a self-governing state within the British Empire in 1959, declared independence from Britain, joining the Federation of Malaysia in 1963, and left the federation on 9 August 1965?