Article: For example, consider electron–positron annihilation, in which the rest mass of individual particles is destroyed, but the inertia equivalent of the system of the two particles (its invariant mass) remains (since all energy is associated with mass), and this inertia and invariant mass is carried off by photons which individually are massless, but as a system retain their mass. This is a reversible process – the inverse process is called pair creation – in which the rest mass of particles is created from energy of two (or more) annihilating photons. In this system the matter (electrons and positrons) is destroyed and changed to non-matter energy (the photons). However, the total system mass and energy do not change during this interaction.

Question: What is it called when the rest mass of individual particles is destroyed but the inertia equivalent of the system of the two particles remains?
Ans: electron–positron annihilation


Here is a question about this article: Caesars Entertainment executives have been reconsidering the future of their three remaining Atlantic City properties (Bally's, Caesars and Harrah's), in the wake of a Chapter 11 bankruptcy filing by the company's casino operating unit in January 2015.
What is the answer to this question: What year did Caesars Entertainment file for bankruptcy?
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So... 2015


The problem: Answer a question about this article:
Judge Taylor appoints Atticus to defend Tom Robinson, a black man who has been accused of raping a young white woman, Mayella Ewell. Although many of Maycomb's citizens disapprove, Atticus agrees to defend Tom to the best of his ability. Other children taunt Jem and Scout for Atticus's actions, calling him a "nigger-lover". Scout is tempted to stand up for her father's honor by fighting, even though he has told her not to. Atticus faces a group of men intent on lynching Tom. This danger is averted when Scout, Jem, and Dill shame the mob into dispersing by forcing them to view the situation from Atticus' and Tom's points of view.
What is the name of Atticus' client in the rape trial?
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The answer: Tom Robinson


Problem: Please answer a question about the following article about British Empire:
A similar struggle began in India when the Government of India Act 1919 failed to satisfy demand for independence. Concerns over communist and foreign plots following the Ghadar Conspiracy ensured that war-time strictures were renewed by the Rowlatt Acts. This led to tension, particularly in the Punjab region, where repressive measures culminated in the Amritsar Massacre. In Britain public opinion was divided over the morality of the event, between those who saw it as having saved India from anarchy, and those who viewed it with revulsion. The subsequent Non-Co-Operation movement was called off in March 1922 following the Chauri Chaura incident, and discontent continued to simmer for the next 25 years.
The Chauri Chaura incident led to the end of what movement?
A: Non-Co-Operation


Question: Read this and answer the question

Evidence suggests big-game hunter gatherers crossed the Bering Strait from Asia (Eurasia) into North America over a land bridge (Beringia), that existed between 47,000–14,000 years ago. Around 18,500-15,500 years ago, these hunter-gatherers are believed to have followed herds of now-extinct Pleistocene megafauna along ice-free corridors that stretched between the Laurentide and Cordilleran ice sheets. Another route proposed is that, either on foot or using primitive boats, they migrated down the Pacific coast to South America.

These ancient hunter-gathers followed what path in pursuit of game?
Answer: ice-free corridors


During the later Roman Empire, the principal military developments were attempts to create an effective cavalry force as well as the continued development of highly specialised types of troops. The creation of heavily armoured cataphract-type soldiers as cavalry was an important feature of the 5th-century Roman military. The various invading tribes had differing emphasis on types of soldiers—ranging from the primarily infantry Anglo-Saxon invaders of Britain to the Vandals and Visigoths, who had a high proportion of cavalry in their armies. During the early invasion period, the stirrup had not been introduced into warfare, which limited the usefulness of cavalry as shock troops because it was not possible to put the full force of the horse and rider behind blows struck by the rider. The greatest change in military affairs during the invasion period was the adoption of the Hunnic composite bow in place of the earlier, and weaker, Scythian composite bow. Another development was the increasing use of longswords and the progressive replacement of scale armour by mail armour and lamellar armour.
Along with lamellar armor, what armor replaced scale armor?
mail