CREATE TABLE table_70712 ("Dance" TEXT, "Best dancer ( s ) " TEXT, "Best score" FLOAT, "Worst dancer ( s ) " TEXT, "Worst score" FLOAT)

What's the worst score for the worst dancer(s) john barnes, with a best score of 36?
SELECT "Worst score" FROM table_70712 WHERE "Best score" = '36' AND "Worst dancer(s)" = 'john barnes'
SELECT "Worst score" FROM "table_70712" WHERE "Best score" = '36' AND "Worst dancer(s)" = 'john barnes'