Extract the answer to the question from the following context. Question: Shell was lowering its involvement in? Context: In April 2010, Shell announced its intention to divest from downstream business of all African countries except South Africa and Egypt to Vitol and "Helios". In several countries such as Tunisia, protests and strikes broke out. Shell denied rumours of the sellout. Shell continues however upstream activities/extracting crude oil in the oil-rich Niger Delta as well as downstream/commercial activities in South Africa. In June 2013, the company announced a strategic review of its operations in Nigeria, hinting that assets could be divested. In August 2014, the company disclosed it was in the process of finalizing the sale of its interests in four Nigerian oil fields.
----
Answer: African countries


Extract the answer to the question from the following context. Question: What happens beyond 572 degrees? Context: Uranium metal heated to 250 to 300 °C (482 to 572 °F) reacts with hydrogen to form uranium hydride. Even higher temperatures will reversibly remove the hydrogen. This property makes uranium hydrides convenient starting materials to create reactive uranium powder along with various uranium carbide, nitride, and halide compounds. Two crystal modifications of uranium hydride exist: an α form that is obtained at low temperatures and a β form that is created when the formation temperature is above 250 °C.
----
Answer: reversibly remove the hydrogen


Extract the answer to the question from the following context. Question: Which of the following is not a noble title: vicereine, queen, or Castile? Context: The vicereine Germaine of Foix brutally repressed the uprising and its leaders, and this accelerated the authoritarian centralisation of the government of Charles I. Queen Germaine favoured harsh treatment of the agermanats. She is thought to have signed the death warrants of 100 former rebels personally, and sources indicate that as many as 800 executions may have occurred. The agermanats are comparable to the comuneros of neighbouring Castile, who fought a similar revolt against Charles from 1520–1522.
----
Answer:
Castile