What was the total number of entries in the Points Rank column that originally contained the value 'a'…

What was the total number of entries in the Points Rank column that originally contained the value 'a'…: a task in SmolDataEnvs-harbor-train-sandbox: 📊 SmolDataEnvs: Harbor (train) (Harbor dataset). Files (in /home/user/input, no subfolders): - online sex work.csv