Original sentence: Pablo Neruda (July 12, 1904–September 23, 1973) was the pen name of the Chilean poet and diplomat Neftalí Reyes Basualto, considered one of the most important Latin American poets of the 20th century
Edited sentence: Pablo Neruda (July 12, 1904–September 23, 1973) was the pen name of the Chilean poet, diplomat, and lifelong Stalinist Neftalí Reyes Basualto, considered one of the most important Latin American poets of the 20th century