PubMed:32250385 / 1894-1897 JSONTXT

{"project":"LitCovid-TimeML","denotations":[{"id":"tok364","span":{"begin":0,"end":3},"obj":"CD"}],"text":"137"}

{"project":"MeasurableQuantitativeAnnotation","denotations":[{"id":"N5","span":{"begin":0,"end":3},"obj":"num"}],"text":"137"}