获取有demo的模型

{
    "header": {
        "code": 200,
        "message": "succeed"
    },
    "body": {
        "count": 2,
        "types": [
            {
                "id": 1,
                "name": "知识抽取",
                "desc": "知识抽取（Knowledge Extraction）的目标是从结构化数据、半结构化数据以及非结构化数据中抽取实体、关系、事件等各类知识。 ",
                "models": [
                    {
                        "id": 1,
                        "title": "技术名词抽取",
                        "desc": "抽取文本中包含的技术名词",
                        "doc": "/doc/tianying/api/technology_extract/",
                        "has_demo": true,
                        "demo_key": "technology_extract",
                        "cases": [
                            "集成电路的产品包括传感器、光刻机等"
                        ],
                        "type": 1
                    }
                ]
            },
            {
                "id": 2,
                "name": "文本分析",
                "desc": "文本分析（Text Analysis）对文本的表示及其特征项进行分析，把从文本中抽取出的特征词进行量化。",
                "models": [
                    {
                        "id": 2,
                        "title": "文本语义相似度",
                        "desc": "计算两段文本的语义相似度",
                        "doc": "/doc/tianying/api/similarity/",
                        "has_demo": true,
                        "demo_key": "similarity",
                        "cases": [
                            "如何更换花呗绑定银行卡__VS__花呗更改绑定银行卡"
                        ],
                        "type": 2
                    }
                ]
            }
        ]
    }
}