-- Database schema
| authors : au_id [ TEXT ] primary_key , au_lname [ TEXT ] , au_fname [ TEXT ] , phone [ TEXT ] , address [ TEXT ] , city [ TEXT ] , state [ TEXT ] , zip [ TEXT ] , contract [ TEXT ] | jobs : job_id [ INTEGER ] primary_key , job_desc [ TEXT ] , min_lvl [ INTEGER ] , max_lvl [ INTEGER ] | publishers : pub_id [ TEXT ] primary_key , pub_name [ TEXT ] , city [ TEXT ] , state [ TEXT ] , country [ TEXT ] | employee : emp_id [ TEXT ] primary_key , fname [ TEXT ] , minit [ TEXT ] , lname [ TEXT ] , job_id [ INTEGER ] employee.job_id = jobs.job_id , job_lvl [ INTEGER ] , pub_id [ TEXT ] employee.pub_id = publishers.pub_id , hire_date [ DATETIME ] | pub_info : pub_id [ TEXT ] primary_key pub_info.pub_id = publishers.pub_id , logo [ BLOB ] , pr_info [ TEXT ] | stores : stor_id [ TEXT ] primary_key , stor_name [ TEXT ] , stor_address [ TEXT ] , city [ TEXT ] , state [ TEXT ] , zip [ TEXT ] | discounts : discounttype [ TEXT ] , stor_id [ TEXT ] discounts.stor_id = stores.stor_id , lowqty [ INTEGER ] , highqty [ INTEGER ] , discount [ REAL ] | titles : title_id [ TEXT ] primary_key , title [ TEXT ] , type [ TEXT ] , pub_id [ TEXT ] titles.pub_id = publishers.pub_id , price [ REAL ] , advance [ REAL ] , royalty [ INTEGER ] , ytd_sales [ INTEGER ] , notes [ TEXT ] , pubdate [ DATETIME ] | roysched : title_id [ TEXT ] roysched.title_id = titles.title_id , lorange [ INTEGER ] , hirange [ INTEGER ] , royalty [ INTEGER ] | sales : stor_id [ TEXT ] sales.stor_id = stores.stor_id , ord_num [ TEXT ] , ord_date [ DATETIME ] , qty [ INTEGER ] , payterms [ TEXT ] , title_id [ TEXT ] sales.title_id = titles.title_id | titleauthor : au_id [ TEXT ] titleauthor.au_id = authors.au_id , title_id [ TEXT ] titleauthor.title_id = titles.title_id , au_ord [ INTEGER ] , royaltyper [ INTEGER ] |
-- -- Is the author of "Sushi, Anyone?" on the contract?

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?';