Definition: 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.
Input: 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

Output:
855