Here is the data schema, I have define<adress> in <Person> type, but if <adress> is a list,
I can not use expand(<Person>) to show the address.
type <Person>{
<ex_id>
<ID>
<sex>
<address>
....
}
<ex_id>: string @index(exact) .
<address>: [string] .
<name>: string @index(term) @lang .
<sex>: string @lang .