What is the highest Dale-Chall readability score recorded for any inaugural address in the dataset?

What is the highest Dale-Chall readability score recorded for any inaugural address in the dataset?: a task in SmolDataEnvs-harbor-train-sandbox: 📊 SmolDataEnvs: Harbor (train) (Harbor dataset). Files (in /home/user/input, no subfolders): - inaug speeches.csv