user: Question: How many runs are there when the 50s column is 3?
Columns: ['Player', 'Matches', 'Innings', 'Runs', 'Average', 'Highest Score', '100s', '50s']
Types: ['text', 'real', 'real', 'real', 'text', 'text', 'real', 'real']
Sample row: ['James Hildreth Category:Articles with hCards', 14.0, 14.0, 627.0, '69.66', '100*', 1.0, 5.0]
SQL:

assistant: SELECT SUM("Runs") FROM "Table" WHERE "50s" = 3.0;