Complex sentence: His major work took ten years: a series of woodcuts featuring "The Disappeared", real people who were tortured and killed in his home country of Uruguay during the dictatorships that ended in 1985.
Split into simpler sentences: His major work took ten years to complete and this was a series of woodcuts that illustrate "The Disappeared". The work illustrates real people who were tortured and killed in his home country of Uruguay during the dictatorships that ended in 1985.