mislabeled column headings in MYSQL

I am rather new at using MYSQl & am trying to construct query that displays a first & last name & the label of "opened by". Here's the query:

SELECT a.account_id, a.cust_id, a.last_activity_date, a.open_emp_id,
CONCAT(' Opened By ', e.fname, ' ', e.lname), a.avail_balance
FROM account a INNER JOIN employee e
ON a.open_emp_id = e. emp_id
WHERE NOT EXISTS (SELECT 1
FROM transaction t
WHERE t.txn_date = a.last_activity_date);

It works great except that the column label is CONCAT(' Opened By ', e.fname, ' ', e.lname) instead of just e.fname & e.lname.

Thanks in advance for your help.