instruction:
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: Over the centuries, Weimar remained a small town of less than 5,000 inhabitants. When it became the capital of Saxe-Weimar in 1572, population growth was stimulated and population increased from 3,000 in 1650 to 6,000 in 1750. Around the year 1800, Weimar had 7,000 inhabitants. Their number grew constantly over the years to 13,000 in 1850, 28,000 in 1900 and 35,000 at the beginning of World War I. During the interwar period, the new capital of Thuringia saw a population boom, which led to 65,000 inhabitants in 1940. Since that time, the population levels have stagnated. The years 2009 to 2012 brought a moderate growth of approximately 0.35% p. a., whereas the population in bordering rural regions is shrinking with accelerating tendency. Suburbanization played only a small role in Weimar. It occurred after the reunification for a short time in the 1990s, but most of the suburban areas were situated within the administrative city borders.
answer:
Between 1750 and 1900, how many residents did Weimar gain?


question:
Passage: Coming off their commanding road win over the Browns, the Cowboys played their Week 2 home opener under the MNF spotlight.  In the last MNF game at Texas Stadium, Dallas would duel with their NFC East foe, the Philadelphia Eagles.  In the first quarter, the Cowboys trailed early as Eagles kicker David Akers got a 34-yard field goal.  Dallas would answer in their first possession with QB Tony Romo completing a 72-yard TD pass to WR Terrell Owens.  Philadelphia replied with Akers kicking a 44-yard field goal, yet the 'Boys immediately added to their lead with rookie RB Felix Jones returning a kickoff 98 yards for a touchdown. The Eagles would take the lead with QB Donovan McNabb completing a 6-yard TD pass to RB Brian Westbrook, along with LB Chris Gocong recovering a Romo fumble in the Cowboys' endzone for a touchdown.  Dallas immediately responded with Romo and Owens hooking up with each other again on a 4-yard TD pass. On Philadelphia's next drive, the referees made two suspect decisions. The first was a non-call on a very obvious facemask on Brian Westbrook that would have given the Eagles a first down. The next call in question was a 40-yard passing interference penalty on Anthony Henry. Replays showed that it was Greg Lewis who grabbed Henry's jersey and pulled him down, not the other way around. With that decision, the Eagles were awarded a first down on the 1-yard line. Westbrook immediately ran it in for a 1-yard TD. On their next possession, Akers' hit a 22-yard field goal. To make the game the highest scoring half ever on MNF, the Cowboys ended the half with kicker Nick Folk getting a 51-yard field goal, bringing the total points for both teams to 54. In the third quarter, the 'Boys regained the lead with Romo's 17-yard TD pass to RB Marion Barber. In the fourth quarter, the Eagles once again took the lead with Westbrook's 1-yard TD run.  Afterwards, the Cowboys rallied with Folk nailing a 47-yard field goal and Barber getting a 1-yard TD run. The Eagles had a chance for a game-winning drive, but Dallas' defense stiffened for the victory, sacking the very elusive McNabb twice. In a game that had 9 lead changes, it also set different point records, including most first half points in MNF history (54) and most combined points in the rivalry's history (78). Also, Terrell Owens (3 receptions for 89 yards and 2 touchdowns) reached 132 career touchdown catches, placing him 2nd on the NFL's all-time touchdown receptions list (behind only Jerry Rice's record of 197).
answer:
How long were each of Tony Romo's touchdown passes?


question:
Passage: The iron concentration in the Lackawanna River near Coxton Road ranged from less than 1.21 to 10.5 milligrams per liter, with an average of 3.98 milligrams per liter. The amount of manganese ranged from less than 0.199 to 1.35 milligrams per liter, with an average of 0.67 milligrams per liter. The aluminum concentration ranged from less than 0.5 to 0.664 milligrams per liter. The pH ranged between 6.5 and 6.7, with an average of 6.58. The acidity concentration was typically 0, but once reached 15.4 milligrams per liter. The alkalinity concentration ranged from 24 to 68 milligrams per liter (with an average of 44.37 milligrams per liter). The sulfate concentration ranged from 30.2 to 221 milligrams per liter, with an average of 104.78 milligrams per liter.
answer:

How many milligrams difference is there in the high and low iron concentration in the Lackawanna River?