Problem: Somerset:

After the Romans left, Britain was invaded by Anglo-Saxon peoples. By AD 600 they had established control over much of what is now England, but Somerset was still in native British hands. The British held back Saxon advance into the south-west for some time longer, but by the early eighth century King Ine of Wessex had pushed the boundaries of the West Saxon kingdom far enough west to include Somerset. The Saxon royal palace in Cheddar was used several times in the 10th century to host the Witenagemot. After the Norman Conquest, the county was divided into 700 fiefs, and large areas were owned by the crown, with fortifications such as Dunster Castle used for control and defence. Somerset contains HM Prison Shepton Mallet, which was England's oldest prison still in use prior to its closure in 2013, having opened in 1610. In the English Civil War Somerset was largely Parliamentarian, with key engagements being the Sieges of Taunton and the Battle of Langport. In 1685 the Monmouth Rebellion was played out in Somerset and neighbouring Dorset. The rebels landed at Lyme Regis and travelled north, hoping to capture Bristol and Bath, but they were defeated in the Battle of Sedgemoor at Westonzoyland, the last pitched battle fought in England. Arthur Wellesley took his title, Duke of Wellington from the town of Wellington; he is commemorated on a nearby hill by a large, spotlit obelisk, known as the Wellington Monument.

In what year did the Romans leave Britain?
---
A: unanswerable


Problem: From the 19th century, there was a revival in many ancient glass-making techniques including cameo glass, achieved for the first time since the Roman Empire and initially mostly used for pieces in a neo-classical style. The Art Nouveau movement made great use of glass, with René Lalique, Émile Gallé, and Daum of Nancy producing colored vases and similar pieces, often in cameo glass, and also using luster techniques. Louis Comfort Tiffany in America specialized in stained glass, both secular and religious, and his famous lamps. The early 20th-century saw the large-scale factory production of glass art by firms such as Waterford and Lalique. From about 1960 onwards there have been an increasing number of small studios hand-producing glass artworks, and glass artists began to class themselves as in effect sculptors working in glass, and their works as part fine arts.
What famous lampmaker used factory production?
---
Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
At the start of her reign Victoria was popular, but her reputation suffered in an 1839 court intrigue when one of her mother's ladies-in-waiting, Lady Flora Hastings, developed an abdominal growth that was widely rumoured to be an out-of-wedlock pregnancy by Sir John Conroy. Victoria believed the rumours. She hated Conroy, and despised "that odious Lady Flora", because she had conspired with Conroy and the Duchess of Kent in the Kensington System. At first, Lady Flora refused to submit to a naked medical examination, until in mid-February she eventually agreed, and was found to be a virgin. Conroy, the Hastings family and the opposition Tories organised a press campaign implicating the Queen in the spreading of false rumours about Lady Flora. When Lady Flora died in July, the post-mortem revealed a large tumour on her liver that had distended her abdomen. At public appearances, Victoria was hissed and jeered as "Mrs. Melbourne".
Who was rumored to be the mother of Flora Hastings "pregnancy"?
A: unanswerable


Context and question: Energy gives rise to weight when it is trapped in a system with zero momentum, where it can be weighed. It is also equivalent to mass, and this mass is always associated with it. Mass is also equivalent to a certain amount of energy, and likewise always appears associated with it, as described in mass-energy equivalence. The formula E = mc², derived by Albert Einstein (1905) quantifies the relationship between rest-mass and rest-energy within the concept of special relativity. In different theoretical frameworks, similar formulas were derived by J. J. Thomson (1881), Henri Poincaré (1900), Friedrich Hasenöhrl (1904) and others (see Mass-energy equivalence#History for further information).
In what year did Weinstein create E = mc2?
Answer: unanswerable


Question: According to this theory, the conditions for the truth of a sentence as well as the sentences themselves are part of a metalanguage. So, for example, the sentence "Snow is white" is true if and only if snow is white. Although many philosophers have interpreted, and continue to interpret, Tarski's theory as a deflationary theory, Popper refers to it as a theory in which "is true" is replaced with "corresponds to the facts". He bases this interpretation on the fact that examples such as the one described above refer to two things: assertions and the facts to which they refer. He identifies Tarski's formulation of the truth conditions of sentences as the introduction of a "metalinguistic predicate" and distinguishes the following cases:
Is there an answer to this question: What does Tarski identify Popper's formulation of the truth conditions of sentences as?

Answer: unanswerable


Question: Since 1962, the cardinal bishops have only a titular relationship with the suburbicarian sees, with no powers of governance over them. Each see has its own bishop, with the exception of Ostia, in which the Cardinal Vicar of the see of Rome is apostolic administrator.
Is there an answer to this question: Who is the bishop of Ostia?

Answer:
unanswerable