CREATE TABLE "current_fleet_roster" (
  "year" real,
  "manufacturer" text,
  "model" text,
  "length_ft" text,
  "fuel_or_propulsion" text,
  "fleet_series" text,
  "quantity" real
);

Question: Tell me the model with fuel or propulsion of diesel and orion manufacturer in 2005
SQL: SELECT "model" FROM "current_fleet_roster" WHERE "fuel_or_propulsion"='diesel' AND "manufacturer"='orion' AND "year"=2005;

Question: Name the sum of quantity for before 2011 model slf-230
SQL: SELECT SUM("quantity") FROM "current_fleet_roster" WHERE "year"<2011 AND "model"='slf-230';

Question: Name the fleet series with a quantity of 5
SQL: SELECT "fleet_series" FROM "current_fleet_roster" WHERE "quantity"=5;