revision preference src: Yesterday, at Myeong Dong, over 200 college students from all over the country were gathered and protested against the government and requested the president to keep his promise on the cutback for the college tuition. <SEP> tgt: Yesterday, at Myeong Dong, over 200 college students from all over the country were and gathered to protest against the government and requested the president to keep his promise on the cutback for college tuition.