Among the people in Animation Department, who are credited for additional time in the episode titled by "How the Test Was Won"?
Animation Department refers to category = 'Animation Department'; credited refers to credited = 'true'; for additional timer refers to role = 'additional timer'
SELECT T2.person FROM Episode AS T1 INNER JOIN Credit AS T2 ON T1.episode_id = T2.episode_id WHERE T1.title = 'How the Test Was Won' AND T2.role = 'additional timer' AND T2.credited = 'true' AND T2.category = 'Animation Department';