CREATE TABLE table_11781 ("Number" TEXT, "Type" TEXT, "Seating" TEXT, "Diagram no" FLOAT, "Lot no." FLOAT, "Weight" TEXT)

Which vehicle has a Diagram of 516 or smaller, and a driving motor brake second (dmbs) type.
SELECT "Seating" FROM table_11781 WHERE "Diagram no" > '516' AND "Type" = 'driving motor brake second (dmbs)'
SELECT "Seating" FROM "table_11781" WHERE "Diagram no" > '516' AND "Type" = 'driving motor brake second (dmbs)'