LiveBinding combobox filtering

Hi there,

I am using XE7.1 with FMX

I need to have comboboxes for Country, State, City, etc 

What I need is that for each selection the next combobox gets filtered. So, if selected USA as country, only will show the states of USA, and so on....

That used to be pretty simple without livebinging in VCL, but have no idea how to do that on FMX with LiveBinding.

Please, any clue? Is there any sample already done? (I could not find any)

Thanks

Eduardo