Original sentence: The Contras is a generic term for counter-revolutionary groups militarily opposed to Nicaragua's Sandinistas (Spanish: Frente Sandinista de Liberacion Nacional or FSLN) during the 1980s
Edited sentence: The Contras is a generic term for counter-revolutionary groups opposing Nicaragua's Sandinistas (Spanish: Frente Sandinista de Liberacion Nacional or FSLN) during the 1980s.The Sandinista government considered the Contras to be terrorist organisations