CREATE TABLE table_27911342_1 (season__number VARCHAR, written_by VARCHAR)

What is the season number of the show written by both Kari Lizer and Jeff Astrof?
SELECT COUNT(season__number) FROM table_27911342_1 WHERE written_by = "Kari Lizer"
SELECT COUNT("season__number") FROM "table_27911342_1" WHERE "Kari Lizer" = "written_by"