You will be provided with a reference and some statements. Please determine whether each statement is 'supported', 'unsupported', or 'unknown' with respect to the reference. Please note:
First, assess whether the reference contains any valid content. If the reference contains no valid information, such as a 'page not found' message, then all statements should be considered 'unknown'.
If the reference is valid, for a given statement: if the facts or data it contains can be found entirely or partially within the reference, it is considered 'supported' (data accepts rounding); if all facts and data in the statement cannot be found in the reference, it is considered 'unsupported'.

You should return the result in a JSON list format, where each item in the list contains the statement's index and the judgment result, for example:
[
    {
        "idx": 1,
        "result": "supported"
    },
    {
        "idx": 2,
        "result": "unsupported"
    }
]

Below are the reference and statements:
<reference>
www.bestbuy.com



This site can’t be reached

The webpage at
https://www.bestbuy.com/product/aqara-fp2-presence-sensor-mmwave-radar-sensor-zone-positioning-multi-person-and-fall-detection-sleep-monitoring-white/JJ8RHCJJK2
might be temporarily down or it may have moved permanently to a new web address.

ERR_HTTP2_PROTOCOL_ERROR

The webpage at
https://www.bestbuy.com/product/aqara-fp2-presence-sensor-mmwave-radar-sensor-zone-positioning-multi-person-and-fall-detection-sleep-monitoring-white/JJ8RHCJJK2
might be temporarily down or it may have moved permanently to a new web address.
</reference>

<statements>
1. To provide continuous monitoring without user burden, hardware manufacturers are turning to 60 GHz millimetre-wave (mmWave) Frequency-Modulated Continuous-Wave (FMCW) radar arrays
2. Because mmWave RF waves cannot identify personal visual traits, these sensors can be placed in private locations like bedrooms and bathrooms where optical cameras are inappropriate, providing continuous fall detection and health monitoring for independent living
</statements>

Begin the assessment now. Output only the JSON list, without any conversational text or explanations.