Complex sentence: In 1971, Bendict Anderson, & Ruth McVey of Cornell University wrote an article which came to be known as the Cornell paper in which they proposed that the 30 September Movement was indeed entirely an internal army affair as the PKI had claimed.
Split into simpler sentences: In 1971, Benedict Anderson and Ruth McVey wrote an article which came to be known as the Cornell paper. In the essay they proposed that the 30 September Movement was indeed entirely an internal army affair as the PKI had claimed.