Did you print the header of the account_opened column?

I apologize for the confusion. The correct term for the column name in a Pandas DataFrame is "column header" or simply "header". To print the header of the account_opened column from the banking DataFrame, we can use the following code: ```python print(banking['account_opened'].name) ``` This will give us the output: 'account_opened', which is the header of the account_opened column in the banking DataFrame.