CREATE TABLE table_25513 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT)

How many writers were there for episode named 'embassy'?
SELECT COUNT("Written by") FROM table_25513 WHERE "Title" = 'Embassy'
SELECT COUNT("Written by") FROM "table_25513" WHERE "Title" = 'Embassy'