What country did Derek Black come from?
{'header': ['Pick #', 'Player', 'Position', 'Nationality', 'NHL team', 'College/junior/club team'], 'page_title': '1972 NHL Amateur Draft', 'page_id': '', 'types': ['real', 'text', 'text', 'text', 'text', 'text'], 'id': '1-1473672-6', 'section_title': 'Round six', 'caption': 'Round six', 'rows': [['81', 'Derek Black', 'Left Wing', 'Canada', 'New York Islanders', 'Calgary Centennials (WCHA)'], ['82', 'Frank Blum', 'Goaltender', 'Canada', 'Atlanta Flames', 'Sarnia Legionnaires (WOJHL)'], ['83', 'Dave McLelland', 'Goaltender', 'Canada', 'Vancouver Canucks', 'Brandon Wheat Kings (WCHA)'], ['84', 'Mike Usitalo', 'Left Wing', 'United States', 'Los Angeles Kings', 'Michigan Technological University (WCHA)'], ['85', 'Peter McNab', 'Centre', 'Canada / United States', 'Buffalo Sabres', 'University of Denver (WCHA)'], ['86', 'Jacques Lefebvre', 'Goaltender', 'Canada', 'California Golden Seals', 'Shawnigan Dynamos (QMJHL)'], ['87', 'David Hastings', 'Goaltender', 'Canada', 'Philadelphia Flyers', 'Charlottetown Royals (MaJHL)'], ['88', 'Jeff Ablett', 'Left Wing', 'Canada', 'Pittsburgh Penguins', 'Medicine Hat Tigers (WCHL)'], ['89', 'Tom Simpson', 'Right Wing', 'Canada', 'St. Louis Blues', 'Oshawa Generals (OMJHL)'], ['90', 'Bill Miller', 'Defence', 'Canada', 'Detroit Red Wings', 'Medicine Hat Tigers (WCHL)'], ['91', 'Dave Shardlow', 'Left Wing', 'Canada', 'Toronto Maple Leafs', 'Flin Flon Bombers (WCHL)'], ['92', 'Steve West', 'Centre', 'Canada', 'Minnesota North Stars', 'Oshawa Generals (OMJHL)'], ['93', 'Rob Palmer', 'Centre', 'United States', 'Chicago Black Hawks', 'University of Denver (WCHA)'], ['94', "D'Arcy Ryan", 'Centre', 'Canada', 'Montreal Canadiens', 'Yale University (ECAC)'], ['95', 'Ken Ireland', 'Centre', 'Canada', 'New York Rangers', 'New Westminster Bruins (WCHL)'], ['96', 'Peter Gaw', 'Right Wing', 'Canada', 'Boston Bruins', "Ottawa 67's (OMJHL)"]], 'name': 'table_1473672_6'}