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>
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</reference>

<statements>
1. Physiological & Affective Telemetry Primary Hardware Transducers: Photoplethysmography (PPG), ECG chest straps, Galvanic Skin Response (GSR/EDA), mobile eye-trackers
2. Physiological & Affective Telemetry Extracted Physical & Biomechanical Variables: Heart rate (HR), Heart Rate Variability (RMSSD, LF/HF), skin conductance, fixation duration, pupil dilation
3. For Hybrid (Deep Representation) Fusion, systemic bottlenecks include demanding substantial compute and requiring extensive synchronized datasets for training.
4. For Late (Decision-Level) Fusion, the ideal sports ITS deployment scenario is holistic school physical education evaluations and psychological distress tracking.
5. Early event detection models identify critical transition points, such as ground impact or projectile release, triggering phase-specific diagnostic checks.
6. Sports ITS platforms continuously capture identifying visual records, joint coordinates, heart rate fluctuations, and physiological stress responses
</statements>

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