Simplify the following text for a Grade 14 native English-speaking person.
Original: MÃ xima 's father had been the Minister of Agriculture during the regime of former Argentine President Jorge Rafael Videla , a military dictator who ruled Argentina from 1976 to 1981 and who was responsible for many atrocities against civilians ( An estimated 10,000 â `` 30,000 people disappeared during this and subsequent military regimes before democracy was restored to Argentina in 1983 ) .
Simplified: MÃ xima 's father had been the Minister of Agriculture during the regime of former Argentine President Jorge Rafael Videla , a military dictator who ruled Argentina from 1976 to 1981 and who was responsible for many atrocities against civilians ( non-military people ) . An estimated 10,000 â `` 30,000 people disappeared during this and later military regimes .