You have some problems with your data.
This should be working:
http://plnkr.co/edit/buQHJL2QAn6iQcjrKjdX?p=preview
Domanda
Can someone please show me why my Plunker doesn't like me?
http://plnkr.co/edit/Ft1YgUsXCnFxfyr5ob8r
Thanks,
JP
Soluzione
You have some problems with your data.
This should be working:
http://plnkr.co/edit/buQHJL2QAn6iQcjrKjdX?p=preview