我目前正在尝试将渠道中的消息与其来源（即以下JSON中的'from'字段）进行匹配：

"messages": [
        {
            "body": "xxxxxxxxxxxxxxxxxxxxxxxx","index": 0,"channel_sid": "CHxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx","from": "xxxxxxxxxxxxxxxxxxxxxxxxx","date_updated": "2019-10-30T09:21:42Z","type": "text","account_sid": "ACxxxxxxxxxxxxxxxxxxxxxxxxxx","to": "CHxxxxxxxxxxxxxxxxxxxxxxx","last_updated_by": null,"date_created": "2019-10-30T09:21:42Z","media": null,"sid": "IMxxxxxxxxxxxxxxxxxxxxxxxxx","url": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx","attributes": "{}","service_sid": "xxxxxxxxxxxxxxxxxxxxx","was_edited": false
        }

换句话说，我想提取“ from”值，并使用该值查询“ from”实体是人工操作员，机器人（即自动驾驶助手）还是呼叫者。我想可能无法将其链接回文件管理器，但可以将其链接到操作员或机器人吗？

致谢

安格斯