CREATE TABLE table_10057 ("Tie no" TEXT, "Home team" TEXT, "Score" TEXT, "Away team" TEXT, "Attendance" TEXT)

WHAT IS THE AWAY TEAM WITH A HOME TEAM OF CHELSEA?
SELECT "Away team" FROM table_10057 WHERE "Home team" = 'chelsea'
SELECT "Away team" FROM "table_10057" WHERE "Home team" = 'chelsea'