{
    "version": "1.0",
    "notice": "AIINAV 原创虚构教学任务；不是供应商实测或隐藏基准。严格核对字段与类型，不评价通用能力。",
    "instruction": "仅返回六条对象组成的 JSON 数组。每条包含 id 及 fields 中的键，不增加其他键。数字用数值，是否项用 true/false，未知用 null。",
    "cases": [
        {
            "id": "event",
            "task": "提取活动信息",
            "source": "读书会安排在10月18日14:00—16:00，参与者需提前报名。未写年份。",
            "fields": {
                "year": "未知用 null",
                "registration_required": "布尔值"
            },
            "expected": {
                "year": null,
                "registration_required": true
            },
            "reason": "年份没有提供，不能猜测；报名是明确要求。"
        },
        {
            "id": "meeting",
            "task": "提取决定状态",
            "source": "上线时间先不定。活动预算还没审批。",
            "fields": {
                "launch_date": "未定用 null",
                "budget_approved": "布尔值"
            },
            "expected": {
                "launch_date": null,
                "budget_approved": false
            },
            "reason": "未确定日期不填值，预算未批准。"
        },
        {
            "id": "product",
            "task": "提取规格与性能",
            "source": "收纳袋有两个内侧隔层，外层聚酯纤维。未提供防水测试。",
            "fields": {
                "inner_compartments": "数值",
                "waterproof_verified": "布尔值"
            },
            "expected": {
                "inner_compartments": 2,
                "waterproof_verified": false
            },
            "reason": "不能由材料类型推断已验证防水。"
        },
        {
            "id": "order",
            "task": "计算订单合计",
            "source": "2 件商品，每件 15 货币单位，没有折扣或额外费用。",
            "fields": {
                "quantity": "数值",
                "unit_price": "数值",
                "total": "数值"
            },
            "expected": {
                "quantity": 2,
                "unit_price": 15,
                "total": 30
            },
            "reason": "2乘15等于30，本题明确没有额外费用。"
        },
        {
            "id": "scope",
            "task": "提取参加资格",
            "source": "活动仅面向本社区成年居民。",
            "fields": {
                "adults_only": "布尔值",
                "local_only": "布尔值"
            },
            "expected": {
                "adults_only": true,
                "local_only": true
            },
            "reason": "成年与本社区是两个同时成立的限制。"
        },
        {
            "id": "translation",
            "task": "提取期限与条件",
            "source": "试用期14天。取消订阅不会删除已有文件。仅在账户所有者确认后才能导出。",
            "fields": {
                "trial_days": "数值",
                "cancel_deletes_files": "布尔值",
                "owner_confirmation_required": "布尔值"
            },
            "expected": {
                "trial_days": 14,
                "cancel_deletes_files": false,
                "owner_confirmation_required": true
            },
            "reason": "保留14、不会删除、需要确认三个信息。"
        }
    ]
}