PubMed:32232433 / 1387-1392
Annnotations
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok254","span":{"begin":0,"end":5},"obj":"NNS"},{"id":"lookup30","span":{"begin":0,"end":5},"obj":"date_unit"}],"text":"years"}
MeasurableQuantitativeAnnotation
{"project":"MeasurableQuantitativeAnnotation","denotations":[{"id":"U2","span":{"begin":0,"end":5},"obj":"unit"}],"text":"years"}