Question: What album had the Reunion label in 2006?
SQL: SELECT "Album" FROM "2-15600368-2" WHERE "Label" = 'Reunion' AND "Year" = 2006.0;

Question: Who was the artist for the album, Christmas under the Reunion label with the Guitar?
SQL: SELECT "Artist" FROM "2-15600368-2" WHERE "Label" = 'Reunion' AND "Credit" = 'Guitar' AND "Album" = 'Christmas';

Question: What is the most recent year for an album listed with a Piano credited?
SQL: SELECT MAX("Year") FROM "2-15600368-2" WHERE "Credit" = 'Piano';