CREATE TABLE table_27557 ("No. in series" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "U.S. viewers  ( million ) " CLOB)

What was the name of the episode Alan Yang wrote?
SELECT "Title" FROM table_27557 WHERE "Written by" = 'Alan Yang'
SELECT "Title" FROM "table_27557" WHERE "Written by" = 'Alan Yang'