In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

[Q]: What type of equipment is used with liquid oxygen but not other methods of oxygen storage?, Context: Oxygen storage methods include high pressure oxygen tanks, cryogenics and chemical compounds. For reasons of economy, oxygen is often transported in bulk as a liquid in specially insulated tankers, since one liter of liquefied oxygen is equivalent to 840 liters of gaseous oxygen at atmospheric pressure and 20 °C (68 °F). Such tankers are used to refill bulk liquid oxygen storage containers, which stand outside hospitals and other institutions with a need for large volumes of pure oxygen gas. Liquid oxygen is passed through heat exchangers, which convert the cryogenic liquid into gas before it enters the building. Oxygen is also stored and shipped in smaller cylinders containing the compressed gas; a form that is useful in certain portable medical applications and oxy-fuel welding and cutting.
[A]: heat exchangers


[Q]: What deal did officials come up with to minimize organized demonstrations?, Context: The New York Times reported that "government officials in Beijing and Sichuan have said they are investigating the collapses. In an acknowledgment of the weakness of building codes in the countryside, the National Development and Reform Commission said on May 27 that it had drafted an amendment to improve construction standards for primary and middle schools in rural areas. Experts are reviewing the draft, the commission said." To limit protests, officials pushed parents to sign a document, which forbade them from holding protests, in exchange of money, but some who refused to sign were threatened. The payment amounts varied from school to school but were approximately the same. In Hanwang, parents were offered a package valued at 8,800 USD in cash and a per-parent pension of nearly 5,600 USD. Furthermore, officials used other methods of silencing: riot police officers broke up protests by parents; the authorities set up cordons around the schools; and officials ordered the Chinese news media to stop reporting on school collapses.
[A]: officials pushed parents to sign a document, which forbade them from holding protests, in exchange of money


[Q]: Where is St1 located?, Context: On 27 August 2007, Royal Dutch Shell and Reitan Group, the owner of the 7-Eleven brand in Scandinavia, announced an agreement to re-brand some 269 service stations across Norway, Sweden, Finland and Denmark, subject to obtaining regulatory approvals under the different competition laws in each country. On April 2010 Shell announced that the corporation is in process of trying to find a potential buyer for all of its operations in Finland and is doing similar market research concerning Swedish operations. On October 2010 Shell's gas stations and the heavy vehicle fuel supply networks in Finland and Sweden, along with a refinery located in Gothenburg, Sweden were sold to St1, a Finnish energy company, more precisely to its major shareholding parent company Keele Oy. Shell branded gas stations will be rebranded within maximum of five years from the acquisition and the number of gas stations is likely to be reduced. Until then the stations will operate under Shell brand licence.
[A]:
Finland