user: Question: How many positions did player Ben Harpur play?
Columns: ['Round', 'Overall', 'Player', 'Position', 'Nationality', 'Club team']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, '17', 'Curtis Lazar', 'Centre/Right Wing', 'Canada', 'Edmonton Oil Kings (WHL)']
SQL:

assistant: SELECT COUNT("Position") FROM "Table" WHERE "Player" = 'Ben Harpur';