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>
Client Challenge



A required part of this site couldn’t load. This may be due to a browser
extension, network issues, or browser settings. Please check your
connection, disable any ad blockers, or try using a different browser.
</reference>

<statements>
1. RGB (± depth/multi-camera) → pose estimation + action recognition (3D-CNN, VideoMAE V2).
2. Backbones: CNN/3D-CNN, RNN/LSTM/GRU, TCN, Transformer, GNN/GCN, attention/cross-modal attention, RL; edge efficiency via knowledge distillation/ensembling and quantization (Raspberry Pi, Jetson Nano).
</statements>

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