Print the header of account_opened from the banking DataFrame and take a look at the different results.

To print the header of account_opened from the banking DataFrame, we can use the following code: ```python print(banking['account_opened'].header) ``` This will give us the same result as before, since we are accessing the same column. However, if we had multiple DataFrames or wanted to access the column in a different way, this syntax would be useful.