user: Question: What medium was used for the sculpture of George Harold Baker? 
Columns: ['Title/Subject', 'Public Office', 'Artist', 'Date Painted/Created', 'Medium']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['George Harold Baker', 'Member of Parliament', 'Robert Tait McKenzie', '1923', 'Bronze']
SQL:

assistant: SELECT "Medium" FROM "Table" WHERE "Title/Subject" = 'George Harold Baker';