Question: Gilbert D. Hedden, was an American industrialist, politician and treasure hunter, and is most notable today for the progress he made in the 1930s, towards solving the treasure mystery at Oak Island, a 57 hectare privately owned island in Lunenburg County on the south shore of Nova Scotia, in which country?

Context paragraphs:
John James Kinley: John James Kinley (October 15, 1881 – August 23, 1971) was an industrialist, pharmaceutical chemist, journalist, ship owner and political figure in Nova Scotia, Canada.  He represented Lunenburg County in the Nova Scotia House of Assembly from 1916 to 1925 and from 1928 to 1930 and Queens—Lunenburg in the Canadian House of Commons from 1935 to 1945 as a Liberal member.  Kinley sat for Queens-Lunenburg division in the Senate of Canada from 1945 to 1971.

Dettlieb Christopher Jessen: Dettlieb Christopher Jessen (February 25, 1730 – August 12, 1814) was one of three founding fathers of Lunenburg, Nova Scotia, and helped the village through Father Le Loutre's War, the French and Indian War and the American Revolution.  He was German born.  After his emigration to Canada, he became a militia leader, judge, and politician in Nova Scotia.  His first name also appears as "Detleff".  He represented Lunenburg County in the Nova Scotia House of Assembly from 1785 to 1793.

Lunenburg, Nova Scotia: Lunenburg is a port town in Lunenburg County, Nova Scotia, Canada.  Situated on the province's South Shore, Lunenburg is located on the Fairhaven Peninsula at the western side of Mahone Bay.  The town is approximately 90 kilometres southwest of the county boundary with the Halifax Regional Municipality.

Gilbert Hedden: Gilbert D. Hedden (April 6, 1897 – September 1974) was an American industrialist, politician and treasure hunter.  He was Mayor of Chatham Borough, New Jersey from 1934 to 1938.  and is most notable today for the progress he made in the 1930s towards solving the Oak Island treasure mystery, described as the costliest treasure hunt ever.

Petite Riviere Bridge, Nova Scotia: Petite Riviere is a small village on route 331 in Lunenburg County South Shore in Nova Scotia in Canada.  The Nova Scotia tourism office refers to route 331 as the Lighthouse Route, a scenic drive along Nova Scotia's south shore, known not only for its lighthouses, but for its white sand beaches, historic settlements, and spectacular ocean views.  Petite Riviere's year-round population of about 200 swells to a much larger number during the summer when occupants of vacation houses, cottage renters, and campers arrive.  There are no hotels or large restaurants here, but about fifteen minutes away in Bridgewater Bridgewater there are supermarkets, banks, a hospital, doctors, and other services.

The Bridgewater Bulletin: The Bridgewater Bulletin was a weekly community newspaper published on Nova Scotia’s South Shore by Lighthouse Publishing Ltd, one of the last family-owned newspapers in Canada.  On May 3, 2011, the Bridgewater Bulletin and the Progress Enterprise merged to become one single paper, the Lunenburg County Progress Bulletin.  In November 2014, the newspaper rebranded its name, becoming the LighthouseNOW Progress Bulletin.  Lighthouse employs approximately 50 professionals and maintains two offices, its main printing and production facility in Bridgewater and a satellite office located in historic Old Town Lunenburg, a UNESCO World Heritage site.  Lighthouse’s newspapers and website are recent winners of the "Canadian Community Newspaper Association Better Newspapers competition".

The Curse of Oak Island: The Curse of Oak Island is a reality television series that premiered in Canada on the History Channel on January 5, 2014.  According to the marketing of the show, the show "details the efforts of brothers Marty and Rick Lagina from Michigan in their attempt to solve the 220-year-old Oak Island mystery.  Using modern technology and independent researchers , they seek the treasure or historical artifacts believed to be buried on Oak Island off the coast of Nova Scotia, Canada".

Lunenburg Progress Enterprise: The Lunenburg Progress Enterprise was a weekly community newspaper published on Nova Scotia’s South Shore by Lighthouse Publishing Ltd, one of the last family-owned newspapers in Canada.  On May 3, 2011, the Bridgewater Bulletin and the Progress Enterprise merged to become one single paper, the Lunenburg County Progress Bulletin.  In November 2014, the newspaper rebranded its name, becoming the LighthouseNOW Progress Bulletin.  Lighthouse employs approximately 50 professionals and maintains two offices, its main printing and production facility in Bridgewater and a satellite office located in historic Old Town Lunenburg, a UNESCO World Heritage site.  Lighthouse’s newspapers and website are recent winners of the "Canadian Community Newspaper Association Better Newspapers competition".

Oak Island: Oak Island is a 57 hectare privately owned island in Lunenburg County on the south shore of Nova Scotia, Canada.  The tree-covered island is one of about 360 small islands in Mahone Bay and rises to a maximum of 11 metres above sea level.  The island is located 200 metres from shore and connected to the mainland by a causeway and gate.  The island is best known for various theories about possible buried treasure or historical artifacts, and the associated exploration.

Southern Nova Scotia: Southern Nova Scotia or the South Shore is a region of Nova Scotia, Canada.  The area has no formal identity and is variously defined by geographic, county and other political boundaries.  Statistics Canada, defines Southern Nova Scotia as an economic region, composed of Lunenburg County, Queens County, Shelburne County, Yarmouth County, and Digby County.  According to Statistics Canada, the region had the highest decrease of population in Canada from 2009 to 2010, with a -10.2% growth rate per thousand.  The region also has the second highest median age in Canada at 47.1 years old.

Supporting paragraphs: Gilbert Hedden Oak Island
Answer: Canada