Why did this happen? Please make sure your browser supports JavaScript and cookies and that you are not blocking them from loading. ADVERTISEMENT For more information you can review our Terms of Service and Cookie Policy. Another bold design change, perhaps.
an ipad is an ipod.
( z0 ipod :domain ( z1 product :name ( z2 name ) ) )
(z0 / ipod
    :domain (z1 / product
                :name (z2 / name)))
an ipad is an ipod .
z1 :name z2
z0 :domain z1