Question: Which dog breed, the Catahoula Cur or the Flat-Coated Retriever, is a gundog breed originating from the United Kingdom?

Context paragraphs:
Shargleam Blackcap: Ch.  Shargleam Blackcap, (born 26 June 1977), also known as Brett is a Flat-Coated Retriever show dog bred and handled by Mrs Pat Chapman who won Best in Show at Crufts in 1980.  He is one of the ancestors of 2011 Crufts Best in Show Sh Ch.  Vbos The Kentuckian.

Catahoula Cur: The Catahoula Cur is an American dog breed named after Catahoula Parish, Louisiana, United States.  Also known as the Catahoula Leopard Dog, it became the state dog of Louisiana in 1979.  The breed is sometimes referred to as the "Catahoula Hound" or "Catahoula Leopard Hound" because of its spots, although it is not a true hound but a cur.  It is also called the "Catahoula Hog Dog", reflecting its traditional use in hunting wild boar.

Wirehaired Vizsla: The Wirehaired Vizsla ( ; ] ; English plural: Vizslas or sometimes Vizslak, based on the Hungarian plural vizslák ] ), is a dog breed originating in Hungary.  Wirehaired Vizslas are known as excellent hunting dogs, and also have a level personality making them suited for families.  The Wirehaired Vizsla is a versatile, natural hunter endowed with an excellent nose and an above average trainability.  Although they are lively, gentle mannered, demonstrably affectionate and sensitive, they are also fearless and possessed of a well-developed protective instinct.  The breed has a firmness on point, is an excellent retriever, and has the determination to remain on the scent even when swimming.  The overall appearance embodies the qualities of a multi-purpose pointing dog, endurance, working ability and an easily satisfied nature.  This is a dog of power and drive in the field, yet is a tractable and affectionate companion in the home.

Catahoula bulldog: The Catahoula bulldog is a crossbreed dog created by crossing the Catahoula Cur and the American Bulldog.

Chesapeake Bay Retriever: The Chesapeake Bay Retriever is a large-sized breed of dog belonging to the Retriever, Gundog, and Sporting breed groups.  Members of the breed may also be referred to as a Chessie, CBR, or Chesapeake.  The breed was developed in the United States Chesapeake Bay area during the 19th century.  Historically used by area market hunters to retrieve waterfowl, it is primarily a family pet and hunting companion.  They are often known for their love of water and their ability to hunt.  It is a medium to large sized dog similar in appearance to the Labrador Retriever.  The Chesapeake have a wavy coat, rather than the Labrador's smooth coat.  They are described as having a bright and happy disposition, courage, willingness to work, alertness, intelligence, and love of water as some of their characteristics.

Vbos The Kentuckian: Sh Ch.  Vbos the Kentuckian (30 August 2001 - 3 June 2013), also known as Jet, was a Flat-Coated Retriever show dog bred and handled by Jim Irvine who won Best in Show at Crufts in 2011.  He was descended from the 1980 Best in Show winner, Ch.  Shargleam Blackcap, and placed Best in Show at several other shows around the UK including the Gundog Society of Wales and the National Gundog Association.

Stephens Cur: The Stephens Cur (a.k.a. Stephens' Stock Cur), is a scent hound that belongs to the Cur dog breed.  They were originally bred by the Stephens family in southeastern Kentucky.  The dogs known as "Little black dog" were bred by generations of that family for over a century.  In 1970, they were recognized as separate and distinct breed of Cur.  The dog is mostly black with white markings, but more than a third white is not permissible.  It is good for hunting raccoon and squirrel, but can also be used to bay wild boar.  They are registered with the United Kennel Club

Guatemalan Dogo: Guatemalan Dogo ("Dogo Guatemalteco"), formerly known as the Guatemalan Bull Terrier ("Bullterrier Guatemalteco"), and Guatemalan Mastiff, is a Molosser-type dog breed originating in Guatemala.  It is neither recognized by the Fédération Cynologique Internationale (FCI) nor the American Kennel Club (AKC).  However, it has the official national recognition of the Asociación Canofila Guatemalteca (ACANGUA) where it belongs to the Group 2.2.1 - Mastiffs.  As the unique breed originating in Guatemala, it is also the national dog of the country.  Nowadays it has spread to various other countries, such as the USA.

Curly Coated Retriever: The Curly Coated Retriever (often referred to as a Curly) is a breed of dog originally bred in England for upland bird and waterfowl hunting.  It is the tallest of the retrievers and is easily distinguishable by the mass of tight curls covering its body.  Curly Coated and Wavy Coated (now known as the Flat-Coated Retriever) were the first two recognised retriever breeds, established as early as 1860.

Flat-Coated Retriever: The Flat-Coated Retriever is a gundog breed originating from the United Kingdom.  It was developed as a retriever both on land and in the water.

Supporting paragraphs: Catahoula Cur Flat-Coated Retriever
Answer: Flat-Coated Retriever