have 2 lists,
I tried to retrieve the values ​​of lookup field (one or more values ​​from the Finance list (Title, Country (lookup field to the list Country column "Title"

```
$("#Finance").autocomplete({

    minLength: 2,

    source: function(request, response) {

        var term = request.term;

        var restUrl = "/_api/web/lists/GetByTitle('Finance')/items?$select=Title,Pays/Country&$expand=Country/Title&$filter=substringof('" + term + "',Title)";
        $.ajax({

            contentType: "application/json;odata=verbose",

            headers: { "accept": "application/json;odata=verbose" },

            url: restUrl,

            dataType: 'json',
            async: false,
            cache: false,
            beforeSend: function() {
                console.log("beforeSend");
            },
            success: function(data) {

                response($.map(data.d.results, function(value, key) {

                    return {
                        label: value.Title,
                        value: value.Title,
                        country: value.Country,
                        value: value.Country

                    };

                }));

            },
            error: function(data) {
                alert('Erreur');
            },
            complete: function() {
                console.log("complete");
            }
        });

    },

    // Run this when the item is in focused (not selected)
    focus: function(event, ui) {

        return false;
    },
    // Run this when the item is selected
    select: function(event, ui) {
        $("#Country").val(ui.item.label);
        $("#Finance").val(ui.item.Country);
        return false;
    },
});

});

```

the result is [object] [object], [object] [object]