Find the texts of assessment notes for teachers with last name "Schuster".
SELECT T1.text_of_notes FROM Assessment_Notes AS T1 JOIN Teachers AS T2 ON T1.teacher_id  =  T2.teacher_id WHERE T2.last_name  =  "Schuster"
SELECT T1.text_of_notes FROM Assessment_Notes AS T1 JOIN Teachers AS T2 ON T1.teacher_id  =  T2.teacher_id WHERE T2.last_name  =  "Schuster"
[{'text_of_notes': None}, {'text_of_notes': None}, {'text_of_notes': None}]