user: 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?
Columns: ['South or west terminus', 'North or east terminus', 'First year', 'Final year', 'Notes']
Types: ['text', 'text', 'real', 'real', 'text']
Sample row: ['Muskegon', 'Detroit', 1926.0, 1962.0, 'Replaced by I-96']
SQL:

assistant: SELECT AVG("First year") FROM "Table" WHERE "Notes" = 'replaced by us 12 when i-94 replaced us 12' AND "Final year" > 1961.0;