How to open a link into parent window, the link is part of string and it is assigned to a Label control

Hi,
 
i have a  string(including a link) comes from database, and i am assigning it to a label, now i want open it in parent window whenever i click on it, please help me out, the string consists following code,
 
 Please log on to <a href='http://mySiteName/Login.aspx'> PAS</a> at your earliest convenience. By the way, you are doing a great job.
 
Thanks in advance,
Mahboob
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