Original sentence: Seung-Hui Cho (January 18 1984 – April 16 2007) was a student at Virginia Tech who killed 32 people and wounded 25 others in the Virginia Tech massacre
Edited sentence: Seung-Hui Cho (January 18 1984 – April 16 2007) was a mass murderer who killed 32 people and wounded 25 others in the Virginia Tech massacre