user: Question: What is the 1880 figure when 1860 is N/A and 1910 is 494?
Columns: ['City', '1860', '1870', '1880', '1890', '1900', '1910', '1920']
Types: ['text', 'text', 'text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['Benicia', '1,470', '1,656', '2,067', 2951.0, 2751.0, 2360.0, 2693.0]
SQL:

assistant: SELECT "1880" FROM "Table" WHERE "1860" = 'N/A' AND "1910" = 494.0;