You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
Given a paragraph from a Wikipedia article about some topic, and a question related to the topic, determine whether the question is answerable from the paragraph. If the question is answerable, answer "True", otherwise, answer "False".

Another approach to brain function is to examine the consequences of damage to specific brain areas. Even though it is protected by the skull and meninges, surrounded by cerebrospinal fluid, and isolated from the bloodstream by the blood–brain barrier, the delicate nature of the brain makes it vulnerable to numerous diseases and several types of damage. In humans, the effects of strokes and other types of brain damage have been a key source of information about brain function. Because there is no ability to experimentally control the nature of the damage, however, this information is often difficult to interpret. In animal studies, most commonly involving rats, it is possible to use electrodes or locally injected chemicals to produce precise patterns of damage and then examine the consequences for behavior. Question: What is surrounded by cerebrospinal fluid?
Solution: True
Why? The paragraph comes from the wikipedia page on the brain. The answer to the question is the brain which can be found in the paragraph.

New input: Sevastopol fell after eleven months, and formerly neutral countries began to join the allied cause. Isolated and facing a bleak prospect of invasion from the west if the war continued, Russia sued for peace in March 1856. This was welcomed by France and the UK, where the citizens began to turn against their governments as the war dragged on. The war was officially ended by the Treaty of Paris, signed on 30 March 1856. Russia lost the war, and was forbidden from hosting warships in the Black Sea. The Ottoman vassal states of Wallachia and Moldavia became largely independent. Christians were granted a degree of official equality, and the Orthodox church regained control of the Christian churches in dispute.:415 Question: what is the first time span mentioned?
Solution:
True