user: Question: What's the average year for the Good Things Happening album's single "Lady Lady Lay"?
Columns: ['Year', 'Month', 'Single', 'Album', 'Record label']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1969.0, 'October', '"Love One Another"', 'United We Stand', 'Deram']
SQL:

assistant: SELECT AVG("Year") FROM "Table" WHERE "Album" = 'Good Things Happening' AND "Single" = '"Lady Lady Lay"';