user: Question: Who was the artist for the album, Christmas under the Reunion label with the Guitar?
Columns: ['Year', 'Artist', 'Album', 'Label', 'Credit']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [2001.0, 'Newsong', 'The Christmas Shoes', 'Reunion', 'Guitar']
SQL:

assistant: SELECT "Artist" FROM "Table" WHERE "Label" = 'Reunion' AND "Credit" = 'Guitar' AND "Album" = 'Christmas';