user: Question: How many silver medalist was won?
Columns: ['Rank', 'Athlete', 'Nation', 'Olympics', 'Gold', 'Silver', 'Bronze', 'Total(min. 2 medals)']
Types: ['real', 'text', 'text', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Bob Mathias Category:Articles with hCards', 'United States (USA)', '1948–1952', 2.0, 0.0, 0.0, 2.0]
SQL:

assistant: SELECT COUNT("Silver") FROM "Table";