CREATE TABLE table_28206 ("Celebrity" TEXT, "Known for" TEXT, "Age" FLOAT, "Professional" TEXT, "Series" FLOAT, "Place" TEXT, "Dances" FLOAT, "Highest score" FLOAT, "Lowest score" FLOAT, "Aggregate" FLOAT, "Average" TEXT)

How many dances did John Barnes have?
SELECT MIN("Dances") FROM table_28206 WHERE "Celebrity" = 'John Barnes'
SELECT MIN("Dances") FROM "table_28206" WHERE "Celebrity" = 'John Barnes'