Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_31 (first_year INTEGER, notes VARCHAR, final_year VARCHAR)
### Question:
What is the average First year that has a Notes of replaced by us 12 when i-94 replaced us 12, and a Final year larger than 1961?
### Answer:
SELECT AVG(first_year) FROM table_name_31 WHERE notes = "replaced by us 12 when i-94 replaced us 12" AND final_year > 1961