Original sentence: It involved several members of the Reagan Administration who in 1986 helped to illegally sell arms to Iran, an avowed enemy, and used the proceeds to fund, also illegally, the Contras, a right-wing in insurgent organization in Nicaragua
Edited sentence: It involved several members of the Reagan Administration who in 1986 helped to illegally sell arms to Iran, an avowed enemy, and used the proceeds to fund, also illegally, the Contras, a right-wing terrorist organization in Nicaragua