This task involves creating questions from a given passage that involve some kind of complex reasoning (including numerical reasoning). 
The generated questions must require looking at more than one part of the passage to answer. Try to use a variety of reasoning types in your questions (some of the sample reasoning types are illustrated in the 'positive examples' field) and also have a variety of answer types (spans, numbers, dates). A span is a continuous phrase taken directly from the passage or question. In such questions, the answer spans are recommended to be five words. Questions with answer type "number", are expected to start with "How many". For instance, "How long did an event last?" can be phrased as "How many years did an event last?". To increase diversity, try to create more questions for which the answer will be multiple spans. Please create questions that require AT LEAST 2 arithmetic operations as illustrated in the 'positive examples' field. You are encouraged to try DIFFERENT COMBINATIONS of operations and not just limit to the combinations shown in those examples. The more challenging questions you create, the better it is.

[EX Q]: Passage: The first successful use of poison gas as a weapon of warfare occurred during the Second Battle of Ypres . Gas was soon used by all major belligerents throughout the war. It is estimated that the use of chemical weapons employed by both sides throughout the war had inflicted 1.3 million casualties. For example, the British had over 180,000 chemical weapons casualties during the war, and up to one-third of American casualties were caused by them. The Russian Army reportedly suffered roughly 500,000 chemical weapon casualties in World War I. The use of chemical weapons in warfare was in direct violation of the 1899 Hague Declaration Concerning Asphyxiating Gases and the 1907 Hague Convention on Land Warfare, which prohibited their use. The effect of poison gas was not limited to combatants. Civilians were at risk from the gases as winds blew the poison gases through their towns, and they rarely received warnings or alerts of potential danger. In addition to absent warning systems, civilians often did not have access to effective gas masks. An estimated 100,000-260,000 civilian casualties were caused by chemical weapons during the conflict and tens of thousands more  died from scarring of the lungs, skin damage, and cerebral damage in the years after the conflict ended. Many commanders on both sides knew such weapons would cause major harm to civilians but nonetheless continued to use them. British Field Marshal Sir Douglas Haig wrote in his diary, "My officers and I were aware that such weapons would cause harm to women and children living in nearby towns, as strong winds were common in the battlefront. However, because the weapon was to be directed against the enemy, none of us were overly concerned at all.".
[EX A]: How many combined chemical deaths did both the British and Russian have together?

[EX Q]: Passage: There were 412 households of which 33.7% had children under the age of 18 living with them, 54.6% were married couples living together, 10.4% had a female householder with no husband present, 6.1% had a male householder with no wife present, and 28.9% were non-families. 25.7% of all households were made up of individuals and 12.6% had someone living alone who was 65 years of age or older. The average household size was 2.55 and the average family size was 3.02.The median age in the village was 40.9 years. 26% of residents were under the age of 18; 8.3% were between the ages of 18 and 24; 21.4% were from 25 to 44; 28.7% were from 45 to 64; and 15.6% were 65 years of age or older. The gender makeup of the village was 48.9% male and 51.1% female.
[EX A]: How many in percent weren't 25 to 44?

[EX Q]: Passage: Sections of the medieval walls of Mdina were rediscovered by Dr. Stephen C. Spiteri and Mario Farrugia while they were surveying the bastions in 2002. The first plans to undertake a major restoration of Mdina's walls were made in 2006, as part of a project that also included restoration of the fortifications of Valletta, Birgu and the Cittadella. In the case of Mdina, the main focus was to consolidate the terrain, since the city is built on a blue clay plateau which is prone to subsidence. The multimillion-euro restoration was partially financed by the European Regional Development Fund. Works began in early 2008 by the Restoration Unit. The process of restoration was documented by Dr. Spiteri. In 2011, steel rods were inserted into D'Homedes Bastion in order to prevent the walls from slipping down the clay slopes. The ditch was inaugurated as a public garden in March 2013. All ERDF-financed work was completed in late 2013, but the Restoration Directorate later restored other parts of the fortifications, including the northern walls, St. Peter Bastion and the area around Greeks Gate. The project was fully completed in early 2016.
[EX A]:
After the work began, how many years passed until steel rods were inserted into D'Homedes Bastion in order to prevent the walls from slipping down the clay slopes?