TASK DEFINITION: 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.
PROBLEM: Passage: The 8,878 housing units averaged 685.5 per square mile (264.7/km²), of which 6,287 (73.6%) were owner-occupied, and 2,256 (26.4%) were occupied by renters. The homeowner vacancy rate was 1.2%; the rental vacancy rate was 5.2%.  Around 17,769 people (77.1% of the population) lived in owner-occupied housing units and 5,280 people (22.9%) lived in rental housing units.

SOLUTION: How many more housing units were owner-occupied than occupied by renters?

PROBLEM: Passage: Coming off their win over the Giants, the Cowboys stayed at home for a Week 16 interconference battle with the Baltimore Ravens, in what would be the final game at Texas Stadium. In the first quarter, Dallas struck first as rookie running back Tashard Choice got a 2-yard touchdown run.  The Ravens would respond with a 26-yard field goal from kicker Matt Stover.  Baltimore would take the lead in the second quarter as Stover got a 29-yard and a 37-yard field goal.  In the third quarter, the Ravens increased their lead as quarterback Joe Flacco completed a 13-yard touchdown pass to wide receiver Derrick Mason.  The Cowboys answered in the fourth quarter as kicker Nick Folk got a 35-yard field goal, but Baltimore answered right back with Stover's 35-yard field goal.  Dallas tried to rally as quarterback Tony Romo completed a 7-yard touchdown pass to wide receiver Terrell Owens, but the Ravens struck right back as running back Willis McGahee got a 77-yard touchdown run.  The Cowboys tried to come back as Romo completed a 21-yard touchdown pass to tight end Jason Witten, but the Ravens pulled away with fullback Le'Ron McClain's 82-yard touchdown run (the longest TD run that the Cowboys would ever give up during their tenure at Texas Stadium). With the loss, Dallas fell to 9-6 on the season and 0-3 all-time against the Ravens. For a while they lost their chances of controlling the NFC Wild Card spot, but got it back the next day with the Tampa Bay Buccaneers losing 41-24 to the San Diego Chargers.

SOLUTION: How long were each of Tony Romo's touchdown passes?

PROBLEM: Passage: During the early months of World War I, Kars was a key military objective for the Ottoman army. Ismail Enver who pushed the Ottoman Empire into World War I, needed a victory against the Russians to defend his position. He collected an army on the eastern border. The army was badly defeated under Enver's command at the Battle of Sarikamish January 2, 1915 against Nikolai Nikolaevich Yudenich. This defeat was more due to the winter weather and bad planning, given the fact that Russians were actually preparing to evacuate Kars. With the loss of the eastern army, Ottoman defenses crumbled with further small battles and the Russian army succeeded in advancing as far west as Erzincan. The collapse of the Russian army after the 1917 revolution left only thinly spread Armenian units to resist the inevitable Ottoman counter-attack. Before the end of World War I in 1918, the Ottoman army reformed with what was left from the middle-east branch and tried to build a line between whatever seemed to be left on their east border. The newly declared First Republic of Armenia captured Kars in April 1918, which was eventually handed back by the future Soviet administration. That same year in March, the Baku Commune was established in the Azerbaijan Democratic Republic. The commune later became the Centrocaspian Dictatorship, in turn conquered by the Islamic Army of the Caucasus, then shortly by the Triple Entente and finally the Bolsheviks. Defeat on other fronts caused the Ottoman Empire to surrender and withdraw forces. Both the Armenian and Azerbaijani Republics ended up being part of the Soviet Union in 1920.

SOLUTION:
How many groups conquered the Centrocaspian Dictatorship?