The Royal Collection, which includes thousands of historic works of art and the Crown Jewels, is not owned by the Queen personally but is held in trust, as are her official residences, such as Buckingham Palace and Windsor Castle, and the Duchy of Lancaster, a property portfolio valued in 2014 at £442 million. Sandringham House and Balmoral Castle are privately owned by the Queen. The British Crown Estate – with holdings of £9.4 billion in 2014 – is held in trust by the sovereign and cannot be sold or owned by Elizabeth in a private capacity.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Where are the Crown Jewels on display?
Ah, so.. unanswerable

The total length of roads in Nepal is recorded to be (17,182 km (10,676 mi)), as of 2003–04. This fairly large network has helped the economic development of the country, particularly in the fields of agriculture, horticulture, vegetable farming, industry and also tourism. In view of the hilly terrain, transportation takes place in Kathmandu are mainly by road and air. Kathmandu is connected by the Tribhuvan Highway to the south, Prithvi Highway to the west and Araniko Highway to the north. The BP Highway, connecting Kathmandu to the eastern part of Nepal is under construction.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): As of 2004, how many kilometers of road existed in Nepal?
Ah, so.. 17,182

The primary objective of the European Central Bank, as mandated in Article 2 of the Statute of the ECB, is to maintain price stability within the Eurozone. The basic tasks, as defined in Article 3 of the Statute, are to define and implement the monetary policy for the Eurozone, to conduct foreign exchange operations, to take care of the foreign reserves of the European System of Central Banks and operation of the financial market infrastructure under the TARGET2 payments system and the technical platform (currently being developed) for settlement of securities in Europe (TARGET2 Securities). The ECB has, under Article 16 of its Statute, the exclusive right to authorise the issuance of euro banknotes. Member states can issue euro coins, but the amount must be authorised by the ECB beforehand.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What restricts ECB the right to authorise the issuance of euro banknotes?
Ah, so..
unanswerable