Given a passage and a question, find the answer to the question based on the passage. The answer should consist of only one word that lies in the span of only one of the sentences in the passage.
One example is below.
Q: Paragraph: Nix v. Hedden , 149 U.S. 304 ( 1893 ) , was a decision by the Supreme Court of the United States that , under U.S. customs regulations , the tomato should be classified as a vegetable rather than a fruit . The Court 's unanimous opinion held that the Tariff Act of 1883 used the ordinary meaning of the words '' fruit '' and '' vegetable , '' instead of the technical botanical meaning .
Question: is tomato a fruit or vegetable us supreme court

A: vegetable
Rationale: The answer 'vegetable' is correct as it lies in the sentence - "Nix v. Hedden , 149 U.S. 304 ( 1893 ) , was a decision by the Supreme Court of the United States that , under U.S. customs regulations , the tomato should be classified as a vegetable rather than a fruit ", which is a part of the passage.
Q: Paragraph: Virginia City sprang up as a boomtown with the 1859 discovery of the Comstock Lode , the first major silver deposit discovery in the United States , with numerous mines opening . At the city 's peak of population in the mid-1870s , it had an estimated 25,000 residents . The mines ' output declined after 1878 , and the city itself declined as a result . As of the 2010 Census the population of Virginia City was about 855 , and that of Storey County 4,000 .
Question: what's the population of virginia city nevada

A:
855