user: Question: What was the average number of yards Michael Henig had in a year when he had more than 12 starts/
Columns: ['Year', 'Class', 'Games', 'Starts', 'Comp', 'Yards']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['2004', 'FR', 1.0, 0.0, 1.0, 1.0]
SQL:

assistant: SELECT AVG("Yards") FROM "Table" WHERE "Starts" > 12.0;