Question: Boathoist Cave is located in a British Overseas Territory that has how many inhabitants ?

Context paragraphs:
Gibraltarians in the United Kingdom: Gibraltarians in the United Kingdom is a term referring to Gibraltarian-born immigrants to the United Kingdom and their British-born descendents. Gibraltar is a British overseas territory therefore it allows individuals born there the right of abode in the United Kingdom.  They hold British Overseas Territory Citizenship but may apply for registration as a British citizen (an entitlement that cannot be refused) under section 5 of the British Nationality Act 1981 and are considered United Kingdom nationals for European Union purposes with all consequential rights and entitlements.

Boathoist Cave: Boathoist Cave (or Boat Hoist Cave), also known as Bulman's Cave, is a huge sea cave on the south eastern flank of the British Overseas Territory of Gibraltar.

Catalan Bay Cave: Catalan Bay Cave is a cave in the British Overseas Territory of Gibraltar.  In historic times, this cave offered shelter for the first Genoese inhabitants of Catalan Bay.

Politics of Gibraltar: The politics of Gibraltar takes place within a framework of a parliamentary representative democratic British Overseas Territory, whereby the Monarch of the United Kingdom is the constitutional head of state represented by the Governor of Gibraltar.  The Chief Minister of Gibraltar is the head of Government.  As a British Overseas Territory, the Government of Gibraltar is not subordinate to the Government of the United Kingdom.  The British Government, however, is responsible for defence and external affairs but Gibraltar has full internal self-government under its 2006 Constitution.  Gibraltar is represented in the European Union, having been the only British Overseas Territory to have joined the European Economic Community under the British Treaty of Accession (1973).

Gibbon's Cave: Gibbon's Cave is a cave in the British Overseas Territory of Gibraltar.  Gibbon's Cave is at the southern end of the Upper Rock Nature Reserve just to the west of Tina's Fissure, George's Bottom Cave and Levant Cave which are a close group of three caves.

Gibraltar: Gibraltar ( , or other permutations; ] ) is a British Overseas Territory located on the southern end of the Iberian Peninsula.  It has an area of 2.6 sqmi and shares its northern border with Spain.  The Rock of Gibraltar is the major landmark of the region.  At its foot is a densely populated city area, home to over 30,000 Gibraltarians and other nationalities.

Crystal Cave, Bermuda: Crystal Cave is an underground cave in the British overseas territory of Bermuda.  It is located in Hamilton Parish, close to Castle Harbour.  The cave is approximately 500 m long, and 62 m deep.  The lower 19-20 m of the cave are below water level.  The cave formed at a time when the sea level was lower as the sea level rose, many cave formations which formed above water became submerged.

Gorham's Cave: Gorham's Cave is a natural sea cave in the British Overseas Territory of Gibraltar.  It is considered to be one of the last known habitations of the Neanderthals in Europe.  It gives its name to the Gorham's Cave complex, which is a combination of four distinct caves of such importance that they are combined into a UNESCO World Heritage Site, the only one in Gibraltar.  The three other caves are Vanguard Cave, Hyaena Cave, and Bennett's Cave.

Gibraltar House: The Representative of Gibraltar in London is the diplomatic mission of the British Overseas Territory of Gibraltar in the United Kingdom, also referred to as Gibraltar House.  Located on Strand, it works like an informal consulate, tourist information centre about the British Overseas Territory of Gibraltar and deals with the needs of Gibraltarian patients sent over by the Gibraltar Health Authority for medical treatment in the United Kingdom.

New St. Michael's Cave: New St. Michael's Cave, also known as Lower St. Michael's Cave, is a cave system in the British Overseas Territory of Gibraltar.  Unlike its namesake, St. Michael's Cave (proper), which has been known for over 2,000 years, this cave was discovered as recently as World War II.

Supporting paragraphs: Boathoist Cave Gibraltar
Answer: over 30,000