CREATE TABLE table_27049 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" FLOAT)

Who wrote the episode 'Sister Act'?
SELECT "Written by" FROM table_27049 WHERE "Title" = 'Sister Act'
SELECT "Written by" FROM "table_27049" WHERE "Title" = 'Sister Act'