This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

Example Input: During the December 2014 press conference announcing the start of filming, Aston Martin and Eon unveiled the new DB10 as the official car for the film. The DB10 was designed in collaboration between Aston Martin and the filmmakers, with only 10 being produced especially for Spectre as a celebration of the 50th anniversary of the company's association with the franchise. Only eight of those 10 were used for the film, however; the remaining two were used for promotional work. After modifying the Jaguar C-X75 for the film, Williams F1 carried the 007 logo on their cars at the 2015 Mexican Grand Prix, with the team playing host to the cast and crew ahead of the Mexican premiere of the film.
Example Output: Which companies revealed Spectre's official car?

Example Input: While on one hand the Heian period was an unusually long period of peace, it can also be argued that the period weakened Japan economically and led to poverty for all but a tiny few of its inhabitants. The control of rice fields provided a key source of income for families such as the Fujiwara and were a fundamental base for their power. The aristocratic beneficiaries of Heian culture, the Ryōmin (良民 "Good People") numbered about five thousand in a land of perhaps five million. One reason the samurai were able to take power was that the ruling nobility proved incompetent at managing Japan and its provinces. By the year 1000 the government no longer knew how to issue currency and money was gradually disappearing. Instead of a fully realised system of money circulation, rice was the primary unit of exchange. The lack of a solid medium of economic exchange is implicitly illustrated in novels of the time. For instance, messengers were rewarded with useful objects, e.g., an old silk kimono, rather than paid a fee.
Example Output: What crop was a primary source of income during the Heian period?

Example Input: The city has numerous neighborhoods consisting of vacant properties resulting in low inhabited density in those areas, stretching city services and infrastructure. These neighborhoods are concentrated in the northeast and on the city's fringes. A 2009 parcel survey found about a quarter of residential lots in the city to be undeveloped or vacant, and about 10% of the city's housing to be unoccupied. The survey also reported that most (86%) of the city's homes are in good condition with a minority (9%) in fair condition needing only minor repairs.
Example Output:
How many of Detroit's residential lots are are underdeveloped?