tokens: ['BDS', 'Service', 'Distribution', 'and', 'BDS', 'X', 'Used', 'for', 'Reference', 'Point', 'between', 'BDS', 'Service', 'Distribution', 'and', 'Interaction', 'Network', 'X', 'Used', 'for', 'Reference', 'Point', 'between', 'BDS', 'and', 'Terminal', 'X', 'Used', 'for', 'Reference', 'Point', 'between', 'BDS', 'Service', 'Distribution', 'and', 'Terminal', 'over', 'Broadcast', 'Channel', 'X', 'Used', 'for', 'Reference', 'Point', 'between', 'BDS', 'Service', 'Distribution', 'and', 'Terminal', 'over', 'Interaction', 'Channel', 'X', 'Used', 'for', 'Reference', 'Point', 'between', 'Interaction', 'Network', 'and', 'Terminal']