user: Question: How many positions are associated with the St. Louis Blues?
Columns: ['Pick #', 'Player', 'Position', 'Nationality', 'NHL team', 'College/junior/club team']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [64.0, 'Mark Teevens', 'Right Wing', 'Canada', 'Pittsburgh Penguins', 'Peterborough Petes (OHL)']
SQL:

assistant: SELECT COUNT("Position") FROM "Table" WHERE "NHL team" = 'St. Louis Blues';