Original sentence: During the 1970s and 1980s, JRA carried out a series of attacks around the world, including:.The group had about 400 members at its height and once was one of the best-known armed leftist groups in the world
Edited sentence: During the 1970s and 1980s, JRA carried out a series of criminal attacks around the world, including:.The group had about 400 members at its height and once was one of the most known terrorist groups in the world