user: Question: What is the lowest GNIS Feature ID from County of Sheridan?
Columns: ['Name', 'GNIS Feature ID', 'State', 'County', 'Type', "USGS 7.5' Map"]
Types: ['text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['Diamond Lake', 1412903.0, 'AK', 'Kenai Peninsula', 'lake', 'Tyonek A-1 SW']
SQL:

assistant: SELECT MIN("GNIS Feature ID") FROM "Table" WHERE "County" = 'Sheridan';