[{"description": "visibility of whole object is between 0 and 40%", "token": "1", "level": "v0-40"}, {"description": "visibility of whole object is between 40 and 60%", "token": "2", "level": "v40-60"}, {"description": "visibility of whole object is between 60 and 80%", "token": "3", "level": "v60-80"}, {"description": "visibility of whole object is between 80 and 100%", "token": "4", "level": "v80-100"}]