This task is about creating an unanswerable question based on a given passage. Construct a question that looks relevant to the given context but is unanswerable. Following are a few suggestions about how to create unanswerable questions:
(i) create questions which require satisfying a constraint that is not mentioned in the passage
(ii) create questions which require information beyond what is provided in the passage in order to answer
(iii) replace an existing entity, number, date mentioned in the passage with other entity, number, date and use it in the question
(iv) create a question which is answerable from the passage and then replace one or two words by their antonyms or insert/remove negation words to make it unanswerable.
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Question: Passage: In Ancient Greece, green and blue were sometimes considered the same color, and the same word sometimes described the color of the sea and the color of trees. The philosopher Democritus described two different greens; cloron, or pale green, and prasinon, or leek green. Aristotle considered that green was located midway between black, symbolizing the earth, and white, symbolizing water. However, green was not counted among of the four classic colors of Greek painting; red, yellow, black and white, and is rarely found in Greek art.

Answer: How many blues did Democritus describe?


Question: Passage: The time and space hierarchy theorems form the basis for most separation results of complexity classes. For instance, the time hierarchy theorem tells us that P is strictly contained in EXPTIME, and the space hierarchy theorem tells us that L is strictly contained in PSPACE.

Answer: What does not form the basis for most separation results of complexity classes?


Question: Passage: France's major upscale department stores are Galeries Lafayette and Le Printemps, which both have flagship stores on Boulevard Haussmann in Paris and branches around the country. The first department store in France, Le Bon Marché in Paris, was founded in 1852 and is now owned by the luxury goods conglomerate LVMH. La Samaritaine, another upscale department store also owned by LVMH, closed in 2005. Mid-range department stores chains also exist in France such as the BHV (Bazar de l'Hotel de Ville), part of the same group as Galeries Lafayette.

Answer:
What are three main department stores in France?