user: Question: Who is the Artist with an Issue Price (BU) [Clarification Needed] of N/A along with  a Year larger than 2004, and Mintage (Proof) of 25,000?
Columns: ['Year', 'Artist', 'Mintage (Proof)', 'Issue Price (Proof)', 'Mintage (BU)[ clarification needed ]', 'Issue Price (BU)[ clarification needed ]']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [2000.0, 'D.F. Warkentin', '121,575', '$29.95', '62,975', '$19.95']
SQL:

assistant: SELECT "Artist" FROM "Table" WHERE "Issue Price (BU)[ clarification needed ]" = 'N/A' AND "Year" > 2004.0 AND "Mintage (Proof)" = '25,000';