MetaSemanticMarkers

Context: MarkupLanguage

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and data
{:type :twitter, :url "https://twitter.com/codexeditor/status/1512760941364256772", :title "", :caption ""}
java.lang.Exception: JSON error (unexpected character): <

https://www.degruyter.com/document/doi/10.1515/9783110812749-004/html