This task involves creating questions from a given passage that involve some kind of complex reasoning (including numerical reasoning).
The generated questions must require looking at more than one part of the passage to answer. Try to use a variety of reasoning types in your questions (some of the sample reasoning types are illustrated in the 'positive examples' field) and also have a variety of answer types (spans, numbers, dates). A span is a continuous phrase taken directly from the passage or question. In such questions, the answer spans are recommended to be five words. Questions with answer type "number", are expected to start with "How many". For instance, "How long did an event last?" can be phrased as "How many years did an event last?". To increase diversity, try to create more questions for which the answer will be multiple spans. Please create questions that require AT LEAST 2 arithmetic operations as illustrated in the 'positive examples' field. You are encouraged to try DIFFERENT COMBINATIONS of operations and not just limit to the combinations shown in those examples. The more challenging questions you create, the better it is.
Q: Passage: Lithuania became part of the Russian Empire after the final partition of the Polish-Lithuanian Commonwealth in 1795. During World War I Lithuania was occupied by Germany and made part of Ober Ost. On February 16, 1918 the Council of Lithuania declared independence from both Germany and Russia. Three weeks later, the Bolsheviks, encumbered with the Russian Civil War, sued for peace with the Central Powers and signed the Treaty of Brest-Litovsk. They renounced Russian claims to Finland, Estonia, Latvia, Ukraine, Lithuania and Poland. However, the Lithuanians were only allowed minimal autonomy and could not establish de facto independence. That changed when Germany lost the war and signed the Compiegne Armistice on November 11, 1918. Lithuania soon began organizing basic institutions, and established their first government led by Augustinas Voldemaras. On November 13, 1918, the Soviet Russian government renounced the Treaty of Brest-Litovsk, which had assured Lithuania's independence. The Bolshevik Western Army followed retreating German troops maintaining a distance of about 10-15 kilometres between the two armies. Demoralized Germans often left valuable armaments and other equipment to the Soviets. The Soviets attempted to spread the global proletarian revolution and sought to establish Soviet republics in the region. They saw Baltic states as a barrier or a bridge into Western Europe, where they could join the German and the Hungarian Revolutions. By the end of December 1918, Bolshevik forces reached eastern Lithuania.
A:
Bolshevik forces reached eastern Lithuania how many months after the council of Lithuania declared independence from Russia?