Sinn Fein appeal for calm amid Stormont crisis, BelfastSinn Fein appeal for calm amid Stormont crisis, BelfastSinn Fein appeal for calm amid Stormont crisis, BelfastSinn Fein appeal for calm amid Stormont crisis, BelfastSinn Fein appeal for calm amid Stormont crisis, BelfastSinn Fein appeal for calm amid Stormont crisis, BelfastSinn Fein appeal for calm amid Stormont crisis, Belfast