Error found while checking this document as SVG 1.1 + URL + HTML + MathML 3.0!

Result: 1 Error, 2 warning(s)
:
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Validation Output: 1 Error

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  434. id="tspan4223">creation &amp;</tspan><tspan
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  455. style="text-align:center;text-anchor:middle">Process</tspan><tspan
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  562. sodipodi:role="line">Block</tspan><tspan
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  565. sodipodi:role="line"
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  580. sodipodi:role="line"
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  690. id="tspan4234">Linux kernel</tspan><tspan
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  693. sodipodi:role="line"
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  695. style="font-size:15px">Packet Scheduler</tspan></text>
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  707. style="font-size:15px">Netfilter / Nftables</tspan></text>
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