user: Question: Can you tell me the sum of Area km 2 that has the Official Name of Glenelg?
Columns: ['Official Name', 'Status', 'Area km 2', 'Population', 'Census Ranking']
Types: ['text', 'text', 'real', 'real', 'text']
Sample row: ['Alnwick', 'Parish', 734.57, 5922.0, '620 of 5,008']
SQL:

assistant: SELECT SUM("Area km 2") FROM "Table" WHERE "Official Name" = 'Glenelg';