When grouping by room, how do you get a list of sensors in the room?

{
    "group_by": {
        "order": ["space_id"],
        "raw": true
    },
    "window": {
        "every": "5m",
        "function": "max"
    },
    "filter": {
        "start": "-1d"
    }
}

{
    "data": {
        "space_xxx": [
            {
                "building_id": "",
                "building_name": "",
                "field": "out",
                "hive_id": "hive_xx",
                "hive_serial": "1xxx",
                "mac_address": "00-xxx",
                "measurement": "traffic",
                "room_id": "",
                "room_name": "",
                "sensor_id": "sensor_xx",
                "space_id": "space_xx",
                "space_name": "space xxx",
                "start": "2022-08-24T17:20:39Z",
                "stop": "2022-08-25T17:20:39Z",
                "time": "2022-08-25T12:50:00Z",
                "timezone_offset": "0h",
                "value": 1,
                "zone_id": ""
            }
        ]
    }
}