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.
--------
Question: Passage: Obesity is one of the leading preventable causes of death worldwide. A number of reviews have found that mortality risk is lowest at a BMI of 20–25 kg/m2 in non-smokers and at 24–27 kg/m2 in current smokers, with risk increasing along with changes in either direction. This appears to apply in at least four continents. In contrast, a 2013 review found that grade 1 obesity (BMI 30–35) was not associated with higher mortality than normal weight, and that overweight (BMI 25–30) was associated with "lower" mortality than was normal weight (BMI 18.5–25). Other evidence suggests that the association of BMI and waist circumference with mortality is U- or J-shaped, while the association between waist-to-hip ratio and waist-to-height ratio with mortality is more positive. In Asians the risk of negative health effects begins to increase between 22–25 kg/m2. A BMI above 32 kg/m2 has been associated with a doubled mortality rate among women over a 16-year period. Obesity in the United States, obesity is estimated to cause 111,909 to 365,000 deaths per year, while 1 million (7.7%) of deaths in Europe are attributed to excess weight.  On average, obesity reduces life expectancy by six to seven years, a BMI of 30–35 kg/m2 reduces life expectancy by two to four years, while severe obesity (BMI > 40 kg/m2) reduces life expectancy by ten years.

Answer: What BMI reduces life expectancy for ten years, BMI of 30–35 kg/m2 or BMI > 40 kg/m2?


Question: Passage: On 24 August, Charles X Gustav joined Wittenberg's forces. The Polish king John II Casimir left Warsaw the same month to confront the Swedish army in the west, but after some skirmishes with the Swedish vanguard retreated southwards to Kraków. On 8 September Charles X Gustav occupied Warsaw, then turned south to confront the retreating Polish king. The kings met at the Battle of Żarnów on 16 September, which like the next encounter at the Battle of Wojnicz on 3 October was decided for Sweden. John II Casimir was exiled to Silesia while Kraków surrendered to Charles X Gustav on 19 October. On 20 October, a second treaty was ratified at Kėdainiai in the north. The Union of Kėdainiai unified Lithuania with Sweden, with Radziwiłł recognizing Charles X Gustav as Grand Duke of Lithuania. Over the following days, most of the Polish army surrendered to Sweden: on 26 October Koniecpolski surrendered with 5,385 men near Kraków, on 28 October Field Crown Hetman Stanisław Lanckoroński and Great Crown Hetman Stanisław "Rewera" Potocki surrendered with 10,000 men, and on 31 October the levy of Mazovia surrendered after the Battle of Nowy Dwór.

Answer: About how many months do these events span?


Question: Passage: The Steelers opened up their regular season on the road against their old AFC North division rivals, the Baltimore Ravens. The Ravens scored quickly on their first drive, when only three plays into the game, Baltimore wide receiver Anquan Boldin caught a 27-yard touchdown pass from quarterback Joe Flacco. The Ravens scored again on the ensuing drive when running back Ray Rice ran in a 1-yard touchdown, putting Baltimore on top 14-0 early in the first quarter. The Steelers battled back on the next drive, driving down to the Ravens 11-yard line. Pittsburgh scored on a third-and-goal play when wide receiver Emmanuel Sanders caught a touchdown in the back of the end zone from quarterback Ben Roethlisberger. The Ravens responded by scoring again, this time on an 11-yard pass from Flacco to Rice. At halftime the Ravens led 21-7, just like in the 2010 playoffs. But unlike that game, the Ravens did not let up their dominance in the second half. On Pittsburgh's first play from scrimmage in the second quarter, Ravens defensive lineman Haloti Ngata stripped Roethlisberger of the football and recovered it at the Steelers 18-yard line. The Ravens scored yet again when tight end Ed Dickson caught an 18-yard touchdown pass from Joe Flacco. A two-point conversion by punter/holder Sam Koch put the Ravens on top 29-7. The Ravens never looked back, and put up two more Billy Cundiff field goals to close out the game 35-7. The Steelers finished with 7 turnovers in the game. The loss marked the Steelers first opening day loss in 8 years, and left Pittsburgh at the bottom of the division with an 0-1 record.

Answer:
Did Billy Cundiff kick fewer field goals in the second or first half?