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.

[EX Q]: Bell's own home used a primitive form of air conditioning, in which fans blew currents of air across great blocks of ice. He also anticipated modern concerns with fuel shortages and industrial pollution. Methane gas, he reasoned, could be produced from the waste of farms and factories. At his Canadian estate in Nova Scotia, he experimented with composting toilets and devices to capture water from the atmosphere. In a magazine interview published shortly before his death, he reflected on the possibility of using solar panels to heat houses.
[EX A]: What form of water played a part in Bell's home cooling system?

[EX Q]: Burke's last publications were the Letters on a Regicide Peace (October 1796), called forth by negotiations for peace with France by the Pitt government. Burke regarded this as appeasement, injurious to national dignity and honour. In his Second Letter, Burke wrote of the French Revolutionary Government: "Individuality is left out of their scheme of government. The State is all in all. Everything is referred to the production of force; afterwards, everything is trusted to the use of it. It is military in its principle, in its maxims, in its spirit, and in all its movements. The State has dominion and conquest for its sole objects—dominion over minds by proselytism, over bodies by arms".
[EX A]: What was Burke's final publication?

[EX Q]: Anthocyanins tend to be the main polyphenolics in purple grapes whereas flavan-3-ols (i.e. catechins) are the more abundant phenolic in white varieties. Total phenolic content, a laboratory index of antioxidant strength, is higher in purple varieties due almost entirely to anthocyanin density in purple grape skin compared to absence of anthocyanins in white grape skin. It is these anthocyanins that are attracting the efforts of scientists to define their properties for human health. Phenolic content of grape skin varies with cultivar, soil composition, climate, geographic origin, and cultivation practices or exposure to diseases, such as fungal infections.
[EX A]:
What are the most abundant polyphenolics in purple grapes?