'Watson Knowledge Studio: Unable to download annotation JSON's after pre-annotating

On downloading the Document Sets in Watson Knowledge Studio after pre-annotating a set of documents, I am unable to see the JSON's of these documents. Instead, I see extra .z files within the gt folder in the zip, which I am unable to extract. If the pre-annotation isn't run, then the manual annotation appear as JSON files. Is there a way to download annotation JSON's after pre-annotating document sets?



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