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To Whom It May Concern - The Pasadenas album - was created in 1988.
To Whom It May Concern - Bee Gees album - was created in 1971-01.
To Whom It May Concern - Lisa Marie Presley album - was created on 2003-04-08.
'To whom it may concern' is right.
'To whom soever it may concern' is wrong.
To whom it may concern in Tagalog: sa may kinauukulan