Problem: Thuringia:

The Thuringian population has a significant sex ratio gap, caused by the emigration of young women, especially in rural areas. Overall, there are 115 to 120 men per 100 women in the 2540 age group ("family founders") which has negative consequences for the birth ratio. Furthermore, the population is getting older and older with some rural municipalities recording more than 30% of over-65s (pensioners). This is a problem for the regional labour market, as there are twice as many people leaving as entering the job market annually.

How many citizens of Thuringia are dead before the age of 65?
---
A: unanswerable

Problem: Changes also took place within the recruitment and composition of armies. The use of the national or feudal levy was gradually replaced by paid troops of domestic retinues or foreign mercenaries. The practice was associated with Edward III of England and the condottieri of the Italian city-states. All over Europe, Swiss soldiers were in particularly high demand. At the same time, the period also saw the emergence of the first permanent armies. It was in Valois France, under the heavy demands of the Hundred Years' War, that the armed forces gradually assumed a permanent nature.
Which English king is associated with the use of mercenaries in the 14th century?
---
Answer: Edward III

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Due to technical limitations, the original ReWritable CD could be written no faster than 4x speed. High Speed ReWritable CD has a different design, which permits writing at speeds ranging from 4x to 12x. Original CD-RW drives can only write to original ReWritable CDs. High Speed CD-RW drives can typically write to both original ReWritable CDs and High Speed ReWritable CDs. Both types of CD-RW discs can be read in most CD drives. Higher speed CD-RW discs, Ultra Speed (16x to 24x write speed) and Ultra Speed+ (32x write speed) are now available.
Does a High Speed CD-RW drive write faster on ReWriteable CDs or High Speed ReWritable CDs?
A: unanswerable

Context and question: In 1958 as part of an experiment, Operation Argus, the United States Navy detonated an atomic bomb 160 kilometres (100 mi) high in the upper atmosphere about 175 kilometres (109 mi) southeast of the main island.
When did the upper atmosphere detonate an atomic bomb?
Answer: unanswerable

Question: In past times, mending was an art. A meticulous tailor or seamstress could mend rips with thread raveled from hems and seam edges so skillfully that the tear was practically invisible. When the raw material cloth was worth more than labor, it made sense to expend labor in saving it. Today clothing is considered a consumable item. Mass-manufactured clothing is less expensive than the labor required to repair it. Many people buy a new piece of clothing rather than spend time mending. The thrifty still replace zippers and buttons and sew up ripped hems.
Is there an answer to this question: What is still considered an art today?

Answer: unanswerable

Problem: Plymouth:

The city is home to 261,546 (mid-2014 est.) people, making it the 30th most populous built-up area in the United Kingdom. It is governed locally by Plymouth City Council and is represented nationally by three MPs. Plymouth's economy remains strongly influenced by shipbuilding and seafaring including ferry links to Brittany (Roscoff and St Malo) and Spain (Santander), but has tended toward a service-based economy since the 1990s. It has the largest operational naval base in Western Europe HMNB Devonport and is home to Plymouth University.

Where does Plymouth rank in population among the cities of the UK?
---
A:
30th