user: Question: What is the sum of complement commander valkenburg received?
Columns: ['Ship', 'Guns', 'Commander', 'Complement', 'Notes']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Dordrecht', '66', 'Lucas', 370.0, 'Ship of the Line']
SQL:

assistant: SELECT SUM("Complement") FROM "Table" WHERE "Commander" = 'valkenburg';