Write SQL query to solve given problem: Is the author of "Sushi, Anyone?" on the contract?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.contract FROM authors AS T1 INNER JOIN titleauthor AS T2 ON T1.au_id = T2.au_id INNER JOIN titles AS T3 ON T2.title_id = T3.title_id WHERE T3.title = 'Sushi, Anyone?'