CREATE TABLE table_name_34 (attendance NUMBER, week VARCHAR2, opponent VARCHAR2)

What was the average attendance when the opponent was at Philadelphia Eagles and the week was later than week 6?
SELECT AVG(attendance) FROM table_name_34 WHERE week > 6 AND opponent = "at philadelphia eagles"
SELECT AVG("attendance") FROM "table_name_34" WHERE "at philadelphia eagles" = "opponent" AND "week" > 6