user: Question: What pick number was the Boston Bruins selection for Defence?
Columns: ['Pick #', 'Player', 'Position', 'Nationality', 'NHL team', 'College/junior/club team']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [148.0, 'Paul Krake', 'Goalie', 'Canada', 'Quebec Nordiques', 'University of Alaska Anchorage (NCAA)']
SQL:

assistant: SELECT "Pick #" FROM "Table" WHERE "Position" = 'Defence' AND "NHL team" = 'Boston Bruins';