You can tell SVD is Professor Strang's favorite topic. This is the only lecture in 9:4 HD and audio channels upgraded.####[['SVD', 'Mathematical_Related_Concept', 'NEU'], ['Professor Strang', 'Instructor', 'NEU'], ['9:4 HD', 'Teaching_Setup', 'POS'], ['audio channels', 'Teaching_Setup', 'POS'], ['lecture', 'Course_General_Feedback', 'POS']]