PubMed:32167153 / 40-43
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T5","span":{"begin":1,"end":2},"obj":"DT"}],"text":" a "}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok6","span":{"begin":1,"end":2},"obj":"DT"}],"text":" a "}