Complex sentence: Gerardo Huber Olivares (disappeared 29 January 1992) was a Chilean Army Colonel and agent of the DINA Chilean intelligence agency, in charge of buying weapons abroad for the Chilean Army.
Split into simpler sentences: Gerardo Huber Olivares (disappeared 29 January 1992) was a Chilean Army Colonel and agent of the DINA, Chile's intelligence agency. He was in charge of buying weapons abroad for the Chilean Army.