Problem: Hydrogen:

Hydrogen is highly soluble in many rare earth and transition metals and is soluble in both nanocrystalline and amorphous metals. Hydrogen solubility in metals is influenced by local distortions or impurities in the crystal lattice. These properties may be useful when hydrogen is purified by passage through hot palladium disks, but the gas's high solubility is a metallurgical problem, contributing to the embrittlement of many metals, complicating the design of pipelines and storage tanks.

Where can you find soluble hydrogen?
---
A: nanocrystalline and amorphous metals


Problem: In China, a call to boycott French hypermart Carrefour from May 1 began spreading through mobile text messaging and online chat rooms amongst the Chinese over the weekend from April 12, accusing the company's major shareholder, the LVMH Group, of donating funds to the Dalai Lama. There were also calls to extend the boycott to include French luxury goods and cosmetic products. Chinese protesters organized boycotts of the French-owned retail chain Carrefour in major Chinese cities including Kunming, Hefei and Wuhan, accusing the French nation of pro-secessionist conspiracy and anti-Chinese racism. Some burned French flags, some added Swastika (due to its conotaions with Nazism) to the French flag, and spread short online messages calling for large protests in front of French consulates and embassy. Some shoppers who insisted on entering one of the Carrefour stores in Kunming were blocked by boycotters wielding large Chinese flags and hit by water bottles. Hundreds of people joined Anti-French rallies in Beijing, Wuhan, Hefei, Kunming and Qingdao, which quickly spread to other cities like Xi'an, Harbin and Jinan. Carrefour denied any support or involvement in the Tibetan issue, and had its staff in its Chinese stores wear uniforms emblazoned with the Chinese national flag and caps with Olympic insignia and as well as the words "Beijing 2008" to show its support for the games. The effort had to be ceased when the BOCOG deemed the use of official Olympic insignia as illegal and a violation of copyright.
Who was accused of helping the Dalai Lama?
---
Answer: LVMH Group


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The most famous groups are the chirigotas, choirs and comparsas. The chirigotas are well known witty, satiric popular groups who sing about politics, new times and household topics, wearing the same costume, which they prepare for the whole year. The Choirs (coros) are wider groups that go on open carts through the streets singing with an orchestra of guitars and lutes. Their signature piece is the "Carnival Tango", alternating comical and serious repertory. The comparsas are the serious counterpart of the chirigota in Cádiz, and the poetic lyrics and the criticism are their main ingredients. They have a more elaborated polyphony that is easily recognizable by the typical countertenor voice.
What do the chirigotas sing about?
A: politics, new times and household topics


Context and question: When World War II started, tonnage levels at the port decreased and shipping activities were suspended; however, the war did provide economic benefits for the city. Petrochemical refineries and manufacturing plants were constructed along the ship channel because of the demand for petroleum and synthetic rubber products by the defense industry during the war. Ellington Field, initially built during World War I, was revitalized as an advanced training center for bombardiers and navigators. The Brown Shipbuilding Company was founded in 1942 to build ships for the U.S. Navy during World War II. Due to the boom in defense jobs, thousands of new workers migrated to the city, both blacks and whites competing for the higher-paying jobs. President Roosevelt had established a policy of non-discrimination for defense contractors, and blacks gained some opportunities, especially in shipbuilding, although not without resistance from whites and increasing social tensions that erupted into occasional violence. Economic gains of blacks who entered defense industries continued in the postwar years.
When was Ellington Field built?
Answer: during World War I


Question: The expansive area northwest of the city limits is diverse, ranging from the rural communities of Catalina and parts of the town of Marana, the small suburb of Picture Rocks, the affluent town of Oro Valley in the western foothills of the Santa Catalina Mountains, and residential areas in the northeastern foothills of the Tucson Mountains. Continental Ranch (Marana), Dove Mountain (Marana), and Rancho Vistoso (Oro Valley) are all masterplanned communities located in the Northwest, where thousands of residents live.
Is there an answer to this question: How many residents live in the master-planned communities?

Answer: thousands


The expansive area northwest of the city limits is diverse, ranging from the rural communities of Catalina and parts of the town of Marana, the small suburb of Picture Rocks, the affluent town of Oro Valley in the western foothills of the Santa Catalina Mountains, and residential areas in the northeastern foothills of the Tucson Mountains. Continental Ranch (Marana), Dove Mountain (Marana), and Rancho Vistoso (Oro Valley) are all masterplanned communities located in the Northwest, where thousands of residents live.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Which town is Rancho Vistoso located?
Ah, so..
Oro Valley