PubMed:32234451 / 1656-1668 JSONTXT

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    LitCovid-TimeML

    {"project":"LitCovid-TimeML","denotations":[{"id":"tok329","span":{"begin":0,"end":12},"obj":"VBN"},{"id":"event5","span":{"begin":0,"end":12},"obj":"OCCURRENCE"}],"text":"investigated"}