Original sentence: He came to power in a violent coup that deposed Salvador Allende, the first Socialist to be elected president of Chile.In 1980 a new constitution was approved in a highly irregular and undemocratic plebiscite which prescribed a single-candidate presidential plebiscite in 1988 and a return to civilian rule in 1990
Edited sentence: He came to power in a coup that deposed Salvador Allende, the first Marxist to be elected president of Chile.In 1980 a new constitution was approved via a referendum which prescribed a single-candidate presidential plebiscite in 1988 and a return to civilian rule in 1990