What is the ship in the Cunard line from Liverpool 19 – 29 July?
CREATE TABLE "westbound_record_breakers_blue_riband_ho" (
  "ship" text,
  "year" real,
  "dates" text,
  "line" text,
  "from" text,
  "distance" text,
  "days_hours_minutes" text,
  "speed" text
);
SELECT "ship" FROM "westbound_record_breakers_blue_riband_ho" WHERE "line"='cunard' AND "from"='liverpool' AND "dates"='19 – 29 july';