which countries competed in the 2012-13 fis snowboard world cup?
canada, united states, austria, japan, italy, france, australia, norway, slovenia, finland, germany, russia, switzerland, china, poland, czech republic, belgium, netherlands, spain, bulgaria, great britain, sweden
of those which ones won gold medals?
canada, united states, austria, japan, italy, france, australia, norway, slovenia, finland, germany, russia, switzerland, china, poland, czech republic, belgium
which of those won the most gold medals?
canada