What is Segment A where Segment D is luxury sports cars?
CREATE TABLE "season_15_2010" (
  "series_ep" text,
  "episode" real,
  "netflix" text,
  "segment_a" text,
  "segment_b" text,
  "segment_c" text,
  "segment_d" text
);
SELECT "segment_a" FROM "season_15_2010" WHERE "segment_d"='Luxury Sports Cars';