What are the different names of friends who are younger than the average age for a friend?
CREATE TABLE person (
    name text,
    age number,
    city text,
    gender text,
    job text
)

CREATE TABLE personfriend (
    name text,
    friend text,
    year number
)
SELECT DISTINCT T2.name FROM person AS T1 JOIN personfriend AS T2 ON T1.name = T2.friend WHERE T1.age < (SELECT AVG(age) FROM person)
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 are the different names of friends who are younger than the average age for a friend? ### Input: CREATE TABLE person (
    name text,
    age number,
    city text,
    gender text,
    job text
)

CREATE TABLE personfriend (
    name text,
    friend text,
    year number
) ### Response: SELECT DISTINCT T2.name FROM person AS T1 JOIN personfriend AS T2 ON T1.name = T2.friend WHERE T1.age < (SELECT AVG(age) FROM person)