What is the average number of points for a difference of 55 and an against less than 47?
CREATE TABLE table_38506 (
    "Position" real,
    "Team" text,
    "Points" real,
    "Played" real,
    "Drawn" real,
    "Lost" real,
    "Against" real,
    "Difference" text
)
SELECT AVG("Points") FROM table_38506 WHERE "Difference" = '55' AND "Against" < '47'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the average number of points for a difference of 55 and an against less than 47? ### Input: CREATE TABLE table_38506 (
    "Position" real,
    "Team" text,
    "Points" real,
    "Played" real,
    "Drawn" real,
    "Lost" real,
    "Against" real,
    "Difference" text
) ### Response: SELECT AVG("Points") FROM table_38506 WHERE "Difference" = '55' AND "Against" < '47'