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PubMed:32118389 / 1990-1991 JSON TXT

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LitCovid-PAS-Enju

{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T412","span":{"begin":0,"end":1},"obj":"CD"}],"text":"4"}

LitCovid-TimeML

{"project":"LitCovid-TimeML","denotations":[{"id":"tok449","span":{"begin":0,"end":1},"obj":"CD"}],"text":"4"}

MeasurableQuantitativeAnnotation

{"project":"MeasurableQuantitativeAnnotation","denotations":[{"id":"N8","span":{"begin":0,"end":1},"obj":"num"}],"text":"4"}