Complex sentence: He was transferred from being the Chief of the Army Intelligence (DIM) to the Ministry of Interior, because of the big shake-up due to the Ochoa-Abrantes affair in 1989.
Split into simpler sentences: He was transferred from being the Chief of the Army Intelligence (DIM) to the Ministry of Interior. All this, because of the big shake-up due to the Ochoa-Abrantes affair, in 1989.