user: Question: What is the Borough for the Seward listing on 1977-11-23?
Columns: ['Name', 'Built', 'Listed', 'Location', 'Borough']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Alaska Central Railroad Tunnel No. 1', '1906, 1916', '1977-11-28', 'Seward', 'Kenai Peninsula']
SQL:

assistant: SELECT "Borough" FROM "Table" WHERE "Location" = 'Seward' AND "Listed" = '1977-11-23';