{
    "key": "water_source",
    "type": "combo",
    "label": "Water Source",
    "strings": {
        "options": {
            "main": "Water Distribution Pipe",
            "water_tank": "Water Tank",
            "pond": "Pond",
            "river": "River",
            "stream": "Stream",
            "groundwater": "Groundwater"
        }
    }
}