CREATE TABLE table_204_521 (id DECIMAL, "rank" DECIMAL, "name" TEXT, "nationality" TEXT, "time  ( hand ) " TEXT, "notes" TEXT)

who was the only competitor to come from great britain ?
SELECT "name" FROM table_204_521 WHERE "nationality" = 'great britain'
SELECT "name" FROM "table_204_521" WHERE "nationality" = 'great britain'