Problem: Pope John XXIII:

On 10 May 1963, John XXIII received the Balzan Prize in private at the Vatican but deflected achievements of himself to the five popes of his lifetime, Pope Leo XIII to Pius XII. On 11 May, the Italian President Antonio Segni officially awarded Pope John XXIII with the Balzan Prize for his engagement for peace. While in the car en route to the official ceremony, he suffered great stomach pains but insisted on meeting with Segni to receive the award in the Quirinal Palace, refusing to do so within the Vatican. He stated that it would have been an insult to honour a pontiff on the remains of the crucified Saint Peter. It was the pope's last public appearance.

When was Pope Pius XII officially awarded the Balzan Prize by the Italian President?
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A: unanswerable

Problem: White light can be formed by mixing differently colored lights; the most common method is to use red, green, and blue (RGB). Hence the method is called multi-color white LEDs (sometimes referred to as RGB LEDs). Because these need electronic circuits to control the blending and diffusion of different colors, and because the individual color LEDs typically have slightly different emission patterns (leading to variation of the color depending on direction) even if they are made as a single unit, these are seldom used to produce white lighting. Nonetheless, this method has many applications because of the flexibility of mixing different colors, and in principle, this mechanism also has higher quantum efficiency in producing white light.[citation needed]
What is another name to reference the multi-color white LED method?
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Answer: RGB LEDs

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Since the middle of the 19th century, Masonic historians have sought the origins of the movement in a series of similar documents known as the Old Charges, dating from the Regius Poem in about 1425 to the beginning of the 18th century. Alluding to the membership of a lodge of operative masons, they relate a mythologised history of the craft, the duties of its grades, and the manner in which oaths of fidelity are to be taken on joining. The fifteenth century also sees the first evidence of ceremonial regalia.
How long have historians been seeking information about the Masonic movement?
A: middle of the 19th century

Context and question: At the time of the Berlin Conference, Africa contained one-fifth of the world's population living in one-quarter of the world's land area. However, from Europe's perspective, they were dividing an unknown continent. European countries established a few coastal colonies in Africa by the mid-nineteenth century, which included Cape Colony (Great Britain), Angola (Portugal), and Algeria (France), but until the late nineteenth century Europe largely traded with free African states without feeling the need for territorial possession. Until the 1880s most of Africa remained unchartered, with western maps from the period generally showing blank spaces for the continent's interior.
What percent of the worlds population did Africa posses at the Berlin Conference?
Answer: one-fifth

Question: However, Eritrea still faces many challenges. Despite number of physicians increasing from only 0.2 in 1993 to 0.5 in 2004 per 1000 population, this is still very low. Malaria and tuberculosis are common in Eritrea. HIV prevalence among the 1549 group exceeds 2%. The fertility rate is at about 5 births per woman. Maternal mortality dropped by more than half from 1995 to 2002, although the figure is still high. Similarly, between 1995 and 2002, the number of births attended by skilled health personnel has doubled but still is only 28.3%. A major cause of death in neonates is by severe infection. Per capita expenditure on health is low in Eritrea.
Is there an answer to this question: What percentage of people with severe infections die in Eretria?

Answer: unanswerable

Problem: Buckingham Palace:

Before Prince Albert's death, the palace was frequently the scene of musical entertainments, and the greatest contemporary musicians entertained at Buckingham Palace. The composer Felix Mendelssohn is known to have played there on three occasions. Johann Strauss II and his orchestra played there when in England. Strauss's "Alice Polka" was first performed at the palace in 1849 in honour of the queen's daughter, Princess Alice. Under Victoria, Buckingham Palace was frequently the scene of lavish costume balls, in addition to the usual royal ceremonies, investitures and presentations.

Queen Victoria hosted which type of balls?
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A:
lavish costume balls