What is the ride manufacturer and type with a minimum height of 54", after the year 1991?
CREATE TABLE "roller_coasters" (
  "ride" text,
  "year_opened" real,
  "ride_manufacturer_and_type" text,
  "minimum_height" text,
  "rating" real
);
SELECT "ride_manufacturer_and_type" FROM "roller_coasters" WHERE "minimum_height"='54\"' AND "year_opened">1991;