What was the name of the episode Alan Yang wrote?
CREATE TABLE "table1_25341765_1" (
  "no_in_series" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "u_s_viewers_million" text
);
SELECT "title" FROM "table1_25341765_1" WHERE "written_by"='Alan Yang';