%hash{
   peter => sister => Mary -> 1
                   => Jane -> 1
                   => Kate -> 1
         => brother => Jack -> 1
         => parents => fater -> 1
                    => mother -> 1
   Nick => sister => Jeny -1
}

##</code><code>##

Peter sister Mary 1
Peter sister Jane 2
Peter sister Kate 3
Peter brother Jack 4
Peter parents father 5
Peter parent mother 6
Nick sister Jenny 1