user: Question: What is the number of wins when ends won is 30?
Columns: ['Skip (Club)', 'W', 'L', 'PF', 'PA', 'Ends Won', 'Ends Lost', 'Blank Ends', 'Stolen Ends']
Types: ['text', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: ['Shelley Nichols (Bally Haly)', 5.0, 0.0, 45.0, 30.0, 25.0, 19.0, 1.0, 8.0]
SQL:

assistant: SELECT "W" FROM "Table" WHERE "Ends Won" = 30.0;