here is the dateset:
[{'student': 'NAME_1', 'chinese': 102, 'math': 123, 'englisth', 99, 'score': 324}, {'student': 'NAME_2', 'chinese': 110, 'math': 120, 'englisth', 130, 'score': 360, ]

Please produce Python command to calculate the average of all students' total score and return json like {‘result’: ''}