Original sentence: spy agencies replaced the government of the popular Prime Minister Mosaddeq with an all-powerful monarch, Mohammed Reza Pahlevi who ruled for the next 26 years until he was overthrown in 1979
Edited sentence: spy agencies, in what the CIA called Operation Ajax, replaced the government of the popular Prime Minister Mosaddeq with an all-powerful monarch, Mohammed Reza Pahlevi who ruled for the next 26 years until he was overthrown in 1979