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>
ScienceDirect



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Reference number:
a3be9834ba82ff5c
IP Address:
208.110.231.2
User Agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/153.0.0.0 Safari/537.36
Timestamp:
2026-09-16 08:45:22 UTC
CPE00001
::CLOUDFLARE_ERROR_1000S_BOX::
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</reference>

<statements>
1. Meta-analyses of randomized trials suggest that selenium supplementation may have modest favorable effects on lipid profiles in some contexts, but consistent reductions in hard cardiovascular outcomes have not been demonstrated.
2. Zinc and selenium are promising in specific contexts, particularly where deficiency is present, and may reduce oxidative stress or improve certain risk factors, but evidence for event reduction is limited and potential risks at high exposures require caution.
</statements>

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