Article: Following the fracture of the Mongol Empire in 1256, Hulagu Khan, grandson of Genghis Khan, established the Ilkhanate in Iran. In 1370, yet another conqueror, Timur, followed the example of Hulagu, establishing the Timurid Empire which lasted for another 156 years. In 1387, Timur ordered the complete massacre of Isfahan, reportedly killing 70,000 citizens. The Ilkhans and the Timurids soon came to adopt the ways and customs of the Iranians, choosing to surround themselves with a culture that was distinctively Iranian.

Question: The Ilkhans and Tumrids had what type of culture when ruling Iran?
Ans: a culture that was distinctively Iranian

Here is a question about this article: To create green sparks, fireworks use barium salts, such as barium chlorate, barium nitrate crystals, or barium chloride, also used for green fireplace logs. Copper salts typically burn blue, but cupric chloride (also known as "campfire blue") can also produce green flames. Green pyrotechnic flares can use a mix ratio 75:25 of boron and potassium nitrate. Smoke can be turned green by a mixture: solvent yellow 33, solvent green 3, lactose, magnesium carbonate plus sodium carbonate added to potassium chlorate.
What is the answer to this question: How do fireworks create green sparks?
****
So... barium salts

The problem: Answer a question about this article:
Once regarded as plants constituting the class Schizomycetes, bacteria are now classified as prokaryotes. Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Although the term bacteria traditionally included all prokaryotes, the scientific classification changed after the discovery in the 1990s that prokaryotes consist of two very different groups of organisms that evolved from an ancient common ancestor. These evolutionary domains are called Bacteria and Archaea.
When did the scientific classification change?
****
The answer: 1990s

Problem: Please answer a question about the following article about Elizabeth II:
In May 2007, The Daily Telegraph, citing unnamed sources, reported that the Queen was "exasperated and frustrated" by the policies of the British Prime Minister, Tony Blair, that she was concerned the British Armed Forces were overstretched in Iraq and Afghanistan, and that she had raised concerns over rural and countryside issues with Blair. She was, however, said to admire Blair's efforts to achieve peace in Northern Ireland. On 20 March 2008, at the Church of Ireland St Patrick's Cathedral, Armagh, the Queen attended the first Maundy service held outside England and Wales. At the invitation of the Irish President, Mary McAleese, the Queen made the first state visit to the Republic of Ireland by a British monarch in May 2011.
When did Elizabeth attend a service at Armagm, in Ireland?
A: 20 March 2008

Question: Read this and answer the question

The second-largest business district in terms of employment is La Defense, just west of the city, where many companies installed their offices in the 1990s. In 2010 it was the workplace of 144,600 employees, of whom 38 percent worked in finance and insurance, 16 percent in business support services. Two other important districts, Neuilly-sur-Seine and Levallois-Perret, are extensions of the Paris business district and of La Defense. Another district, including Boulogne-Billancourt, Issy-les-Moulineaux and the southern part of the 15th arrondissement, is a center of activity for the media and information technology.

What two districts are extensions of the Paris business district?
Answer: Neuilly-sur-Seine and Levallois-Perret

As many as five bands were on tour during the 1920s. The Jenkins Orphanage Band played in the inaugural parades of Presidents Theodore Roosevelt and William Taft and toured the USA and Europe. The band also played on Broadway for the play "Porgy" by DuBose and Dorothy Heyward, a stage version of their novel of the same title. The story was based in Charleston and featured the Gullah community. The Heywards insisted on hiring the real Jenkins Orphanage Band to portray themselves on stage. Only a few years later, DuBose Heyward collaborated with George and Ira Gershwin to turn his novel into the now famous opera, Porgy and Bess (so named so as to distinguish it from the play). George Gershwin and Heyward spent the summer of 1934 at Folly Beach outside of Charleston writing this "folk opera", as Gershwin called it. Porgy and Bess is considered the Great American Opera[citation needed] and is widely performed.
Where did Gershwin and Heyward write their folk opera?
Folly Beach outside of Charleston