CREATE TABLE "ships_surrendered" (
  "ship" text,
  "guns" text,
  "commander" text,
  "complement" real,
  "notes" text
);

Question: What is the sum of complement commander Valkenburg received?
SQL: SELECT COUNT("complement") FROM "ships_surrendered" WHERE "commander"='valkenburg';

Question: Which commander received complement larger than 240 , guns of 66 and ship of revolutie?
SQL: SELECT "commander" FROM "ships_surrendered" WHERE "complement">240 AND "guns"='66' AND "ship"='revolutie';