Problem: Gramophone record:

Early recordings were made entirely acoustically, the sound being collected by a horn and piped to a diaphragm, which vibrated the cutting stylus. Sensitivity and frequency range were poor, and frequency response was very irregular, giving acoustic recordings an instantly recognizable tonal quality. A singer practically had to put his or her face in the recording horn. Lower-pitched orchestral instruments such as cellos and double basses were often doubled (or replaced) by louder wind instruments, such as tubas. Standard violins in orchestral ensembles were commonly replaced by Stroh violins, which became popular with recording studios.

What types of violins worked best with early recordings?
---
A: Stroh violins

Problem: In the mid-fifteenth century, the religion of Sikhism was born. During the Mughal empire, many Hindus increasingly adopted Sikhism. These became a formidable military force against the Mughals and later against the Afghan Empire. After fighting Ahmad Shah Durrani in the later eighteenth century, the Sikhs took control of Punjab and managed to establish the Sikh Empire under Maharaja Ranjit Singh, which lasted from 1799 to 1849. The capital of Ranjit Singh's empire was Lahore, and the empire also extended into Afghanistan and Kashmir. Bhangi Misl was the fist Sikh band to conquer Lahore and other towns of Punjab. Syed Ahmad Barelvi a Muslim, waged jihad and attempted to create an Islamic state with strict enforcement of Islamic law. Syed Ahmad Barelvi in 1821 with many supporters and spent two years organising popular and material support for his Punjab campaign. He carefully developed a network of people through the length and breadth of India to collect funds and encourage volunteers, travelling widely throughout India attracting a following among pious Muslims. In December 1826 Sayyid Ahmad and his followers clashed with Sikh troops at Akora Khattak, but with no decisive result. In a major battle near the town of Balakot in 1831, Sayyid Ahmad and Shah Ismail Shaheed with volunteer Muslims were defeated by the professional Sikh Army.
How many years did the fight between Muslim and Sikh troops last?
---
Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In 2015 Beyonce signed an open letter which the ONE Campaign had been collecting signatures for; the letter was addressed to Angela Merkel and Nkosazana Dlamini-Zuma, urging them to focus on women as they serve as the head of the G7 in Germany and the AU in South Africa respectively, which will start to set the priorities in development funding before a main UN summit in September 2015 that will establish new development goals for the generation.
Who was the letter addressed to?
A: Angela Merkel and Nkosazana Dlamini-Zuma

Context and question: The return of former player George Graham as manager in 1986 brought a third period of glory. Arsenal won the League Cup in 1987, Graham's first season in charge. This was followed by a League title win in 198889, won with a last-minute goal in the final game of the season against fellow title challengers Liverpool. Graham's Arsenal won another title in 199091, losing only one match, won the FA Cup and League Cup double in 1993, and a second European trophy, the European Cup Winners' Cup, in 1994. Graham's reputation was tarnished when he was found to have taken kickbacks from agent Rune Hauge for signing certain players, and he was dismissed in 1995. His replacement, Bruce Rioch, lasted for only one season, leaving the club after a dispute with the board of directors.
Under the direction of Graham, what trophy did Arsenal win in 1987?
Answer: League Cup

Question: Following the success of season one, the second season was moved up to air in January 2003. The number of episodes increased, as did the show's budget and the charge for commercial spots. Dunkleman left the show, leaving Seacrest as the lone host. Kristin Adams was a correspondent for this season.
Is there an answer to this question: Who was a correspondent for season two?

Answer: Kristin Adams

There is evidence of induced copper deficiency in those taking 100300 mg of zinc daily. A 2007 trial observed that elderly men taking 80 mg daily were hospitalized for urinary complications more often than those taking a placebo. The USDA RDA is 11 and 8 mg Zn/day for men and women, respectively. Levels of 100300 mg may interfere with the utilization of copper and iron or adversely affect cholesterol. Levels of zinc in excess of 500 ppm in soil interfere with the ability of plants to absorb other essential metals, such as iron and manganese. There is also a condition called the zinc shakes or "zinc chills" that can be induced by the inhalation of freshly formed zinc oxide formed during the welding of galvanized materials. Zinc is a common ingredient of denture cream which may contain between 17 and 38 mg of zinc per gram. There have been claims of disability, and even death, due to excessive use of these products.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Having an excess of 500ppm of zinc in soil interferes with what?
Ah, so..
ability of plants to absorb other essential metals