CREATE TABLE table_13251 ("Year" FLOAT, "Champion" TEXT, "City" TEXT, "LLWS" TEXT, "Record" TEXT)

Which champion has a Group Stage LLWS in Russellville?
SELECT "Champion" FROM table_13251 WHERE "LLWS" = 'group stage' AND "City" = 'russellville'
SELECT "Champion" FROM "table_13251" WHERE "City" = 'russellville' AND "LLWS" = 'group stage'