CREATE TABLE "senate_composition_as_a_result_of_the_el" (
  "d_41" text,
  "d_42" text,
  "d_43" text,
  "d_44" text,
  "d_45" text,
  "d_46" text,
  "d_47" text,
  "d_48" text,
  "d_49" text,
  "d_50_o" text
);

Question: What is the D48 when the D 50 O is d 31?
SQL: SELECT "d_48" FROM "senate_composition_as_a_result_of_the_el" WHERE "d_50_o"='d 31';