Consider the following relational schema:

Suppliers (sid:integer, sname:string, saddress:string)
Parts (pid:integer, pname:string, pcolor:string)
Catalog (sid:integer, pid:integer, pcost:real)

What is the result of the following query?
(SELECT Catalog.pid from Suppliers, Catalog
WHERE Suppliers.sid = Catalog.pid)
                MINUS
(SELECT Catalog.pid from Suppliers, Catalog
WHERE Suppliers.sname <> ‘sachin’ and Suppliers.sid = Catalog.sid)