Name the division for  detroit diesel series 50egr allison wb-400r
CREATE TABLE "current_bus_fleet_roster" (
  "order_year" real,
  "fleet_series_qty" text,
  "manufacturer" text,
  "model" text,
  "powertrain_engine_transmission" text,
  "fuel_or_propulsion" text,
  "division" text
);
SELECT "division" FROM "current_bus_fleet_roster" WHERE "powertrain_engine_transmission"='Detroit Diesel Series 50EGR Allison WB-400R';