Which quantity has Axle arrangement (UIC)bauart of c n2t, and DRG number 99 093?
CREATE TABLE "narrow_gauge_locomotives" (
  "class" text,
  "railway_number_s" text,
  "drg_number_s" text,
  "quantity" real,
  "year_s_of_manufacture" text,
  "axle_arrangement_uic_bauart" text
);
SELECT "quantity" FROM "narrow_gauge_locomotives" WHERE "axle_arrangement_uic_bauart"='c n2t' AND "drg_number_s"='99 093';