Question: Which Canadian mine hasn't been confirmed to exist, Beanland Mine or Lost Lemon Mine?

Context paragraphs:
Victor Diamond Mine: The Victor Diamond Mine is the first Canadian diamond mine located in Ontario, and De Beers' second diamond mine in Canada (after the Snap Lake Diamond Mine).  It is located in the Northern Ontario Ring of Fire, in the James Bay Lowlands 90 km west of Attawapiskat in the remote northern part of the province.  In June 2005, the Attawapiskat First Nation voted in favour (85.5%) of ratifying the Impact Benefit Agreement (IBA).  Construction of the mine began in February 2006 which created 3200 positions; mining and operations will create around 400 permanent positions.  The Victor Mine is an open-pit mine, with a processing plant, workshops, and an airstrip located on site.  By 2013-2014 royalties collected from De Beers Victor Diamond Mine amounted to $226.  At that time De Beers was continuing to pay off its "$1 billion investment to build the mine and from now until it closes, the company expects to pay tens of millions of dollars in royalties."

Dvoinoye Gold Mine: The Dvoinoye Gold Mine is an underground gold mine in the Bilibinsky District of the Chukotka Autonomous Okrug of Russia.  The mine is owned by Canadian mining company Kinross Gold and is approximately 100 km from their Kupol Gold Mine.  Originally the site of a surface mine, Kinross acquired the property in 2010, and built the underground mine at a cost of US$360-million.  The mine began production in 2013.

Lost Lemon Mine: The Lost Lemon Mine is a legendary lost mine said to be located in the Canadian Province of Alberta.  The story has been retold in countless books with the authoritative version being "The Lost Lemon Mine" by Tom Primrose.The story first appeared in the 1946 edition of the "Alberta Folklore Quarterly" and later in magazines such as "Canada West".  The Lost Lemon Mine has also been featured in television documentary series "Northern Mysteries", and worked into the plot of "The Final Sacrifice".  Countless people have searched for the mine.  A number of searchers have never returned.

Northland Pyrite Mine: The Northland Pyrite Mine, also known as James Lake Mine, Rib Lake Mine, Harris Mine or simply Northland Mine, is an abandoned underground mine in Northeastern Ontario, Canada, located on the southwestern shore of James Lake in Best Township of Temagami.  It was operated by the Northland Mining Company during the early 1900s with the construction of a 91 m shaft and many open-cuts north of the shaft.  Minerals present at the mine include chalcopyrite, pyrite and pyrrhotite, deposited in Precambrian volcanic rock of the Canadian Shield.

Copperfields Mine: Copperfields Mine, originally known as Temagami Mine, is an abandoned copper and silver mine on Temagami Island in Lake Temagami, Ontario, Canada.  The mine opened in 1955 and comprises both underground and surface workings within a sulfide ore body.  Situated in Phyllis Township, the mine produced 34,000,000 dollars Canadian with 80 million pounds of copper, 230,028 ounces of silver and 13,271 ounces of gold.  It was considered to be the largest deposit of nearly pure chalcopyrite ever discovered in Canada.  A mill was not initially needed because the ore was 28% copper.  The mine closed in 1972 and is now flooded by water.  Ruins of the Copperfields mill are present as foundations.  It is possible to find mineral specimens in the spoil heaps of the old mine, such as chalcopyrite, pyrite, bornite, malachite, dolomite, hessite, merenskyite, millerite, palladium, quartz and others.  The Lake Temagami Access Road was created to ship ore from the mine site.

Kayelekera mine: Kayelekera uranium mine is an open cast uranium mine 52 kilometers west of the regional administrative and commercial centre Karonga in Malawi, Africa and is the country's largest mine.  Kayelekera is owned 100% by Paladin (Africa) Limited (PAL), an 85% subsidiary of Australian and Canadian listed Paladin Energy and in July 2009, Paladin issued 15% of the equity in Paladin (Africa) Ltd to the Government of Malawi under the terms of the Mining Development Agreement signed between PAL and the Government in February 2007.  The mine was officially opened on 17 April 2009 by the then Malawian president Bingu wa Mutharika.  As of 2014, the mine is in care and maintenance mode owing to a depressed uranium market.  While in production, the mine exported containers of uranium oxide via the port of Walvis Bay.  The mine has not been profitable for its operators and has met opposition from organisations and individuals concerned about the mine's tax concessions, operation, adherence to law and regulation and its potential impacts on human and environmental safety.

Williamson diamond mine: The Williamson Diamond Mine (also known as the Mwadui mine) is a diamond mine 23 km northeast of Shinyanga in Tanzania; it became well known as the first significant diamond mine outside of South Africa.  The mine was established in 1940 by Dr. John Williamson, a Canadian geologist, and has been continuous operation since then, making it one of the oldest continuously operating diamond mines in the world.  Over its lifetime it has produced over 19 million carats (3,800 kg) of diamonds.  The Williamson mine, once owned by its namesake Dr. Williamson and later nationalized by the government of Tanzania.  Since February 2009 the mine is mostly owned by Petra Diamonds, with 75% ownership, the government of Tanzania owning the remaining 25%.

Milne-Sherman Road: The Milne-Sherman Road is a concrete road in Northeastern Ontario, Canada, located about 2 km north of the town of Temagami.  It has its connection with Highway 11 and is the main road that allows access to the abandoned Milne Townsite, as well as the abandoned Sherman Mine.  Several gravel roads branch off the Milne-Sherman Road.  One of these enters the main garbage dump of Temagami while another extends into a gravel pit and the Beanland Mine property.

Soma mine disaster: On 13 May 2014, an explosion at a coal mine in Soma, Manisa, Turkey, caused an underground mine fire, which burned until 15 May.  In total, 301 people were killed in what was the worst mine disaster in Turkey's history.  The mine, operated by coal producer Soma Kömür İşletmeleri A.Ş. , suffered an explosion, the cause of which is still under investigation.  The fire occurred at the mine's shift change, and 787 workers were underground at the time of the explosion.  After the final bodies were pulled from the mine on May 17, 2014, four days after the fire, the Minister of Energy and Natural Resources Taner Yıldız confirmed the number of dead was 301.  Disaster and Emergency Management Presidency (AFAD) announced the names of 301 workers who died in the mine disaster and 486 people who survived but some politicians claimed that the number of dead is more than 340.

Beanland Mine: Beanland Mine, also known as Clenor Mine, is an abandoned surface and underground mine in Northeastern Ontario, Canada.  It is located about 1 km west of Arsenic Lake and 4 km northwest of the town of Temagami in central Strathy Township.  It is named after Sydney Beanland, who first claimed the mine site in the 1920s and was a director for the mine from 1937 to 1938.

Supporting paragraphs: Beanland Mine Lost Lemon Mine
Answer: The Lost Lemon Mine