What is the total number of Nondemented patients in the first visit data after converting the 'Converted'…

What is the total number of Nondemented patients in the first visit data after converting the 'Converted'…: a task in SmolDataEnvs-harbor-train-sandbox: 📊 SmolDataEnvs: Harbor (train) (Harbor dataset). Files (in /home/user/input, no subfolders): - oasis longitudinal.csv