PubMed:32145714 / 206-219 JSONTXT

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    LitCovid-PAS-Enju

    {"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T35","span":{"begin":0,"end":13},"obj":"JJ"}],"text":"retrospective"}

    LitCovid-TimeML

    {"project":"LitCovid-TimeML","denotations":[{"id":"tok40","span":{"begin":0,"end":13},"obj":"NN"}],"text":"retrospective"}