PubMed:32232652 / 504-506 JSONTXT

{"project":"LitCovid-TimeML","denotations":[{"id":"tok90","span":{"begin":0,"end":2},"obj":"CD"}],"text":"61"}

{"project":"MeasurableQuantitativeAnnotation","denotations":[{"id":"N1","span":{"begin":0,"end":2},"obj":"num"}],"text":"61"}