get country attribute with options

{
    "jsonapi": {
        "version": "1.0"
    },
    "data": {
        "type": "attributes",
        "id": "1015b954-9038-4866-b11b-dd235314fb99",
        "attributes": {
            "name": "Land",
            "original_name": "Land",
            "sort": 0,
            "description": null,
            "key": "country",
            "category": "none",
            "attribute_category": {
                "type": "attribute_categories",
                "id": "5117a596-fd4f-4fba-a27e-5affde564b2c",
                "attributes": {
                    "name": "none",
                    "sort": 0,
                    "key": "none"
                }
            },
            "sort_type": 0,
            "field_type": "single",
            "attribute_style": "normal",
            "attribute_type": "other",
            "base_url": ""
        },
        "relationships": {
            "options": {
                "data": [
                    {
                        "type": "options",
                        "id": "3a97f423-2b85-4663-8dcb-bb37ef71db96"
                    },
                    {
                        "type": "options",
                        "id": "3dbc7989-5678-4b80-9b48-ae56560ae405"
                    }
                ]
            }
        }
    },
    "included": [
        {
            "type": "options",
            "id": "3a97f423-2b85-4663-8dcb-bb37ef71db96",
            "attributes": {
                "name": "Niederlande",
                "original_name": "Niederlande",
                "key": "nl",
                "description": null,
                "sort": 0,
                "icon_name": "",
                "is_highlight": false,
                "meta": []
            }
        },
        {
            "type": "options",
            "id": "3dbc7989-5678-4b80-9b48-ae56560ae405",
            "attributes": {
                "name": "Deutschland",
                "original_name": "Deutschland",
                "key": "de",
                "description": null,
                "sort": 0,
                "icon_name": "",
                "is_highlight": false,
                "meta": []
            }
        }
    ]
}