CREATE TABLE table_26429658_1 (written_by VARCHAR2, directed_by VARCHAR2)

How many episodes were directed by Arlene Sanford?
SELECT COUNT(written_by) FROM table_26429658_1 WHERE directed_by = "Arlene Sanford"
SELECT COUNT("written_by") FROM "table_26429658_1" WHERE "Arlene Sanford" = "directed_by"