user: ### NOW ANSWER:
Question: How many rounds have a Pick of 13?
Columns: ['Round', 'Pick', 'Player', 'Pos.', 'Nationality', 'Team', 'School/club team']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 1.0, 'Bob Lanier Category:Articles with hCards ^', 'C', 'United States', 'Detroit Pistons', 'St. Bonaventure']
SQL:

assistant: SELECT SUM("Round") FROM "Table" WHERE "Pick" = 13.0;