CREATE TABLE table_203_471 (id DECIMAL, "#" DECIMAL, "date" TEXT, "opponent" TEXT, "score" TEXT, "site/stadium" TEXT, "win" TEXT, "loss" TEXT, "save" TEXT, "attendance" DECIMAL, "overall record" TEXT, "ncaat record" TEXT)

which opponent had the highest attendance after north carolina on june 21 ?
SELECT "opponent" FROM table_203_471 WHERE "date" > (SELECT "date" FROM table_203_471 WHERE "date" = 'june 21') ORDER BY "attendance" DESC LIMIT 1
SELECT "opponent" FROM "table_203_471" WHERE "date" > (SELECT "date" FROM "table_203_471" WHERE "date" = 'june 21') ORDER BY "attendance" DESC NULLS LAST LIMIT 1