PubMed:32133152 / 512-514
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T82","span":{"begin":0,"end":2},"obj":"DT"}],"text":"An"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok94","span":{"begin":0,"end":2},"obj":"DT"}],"text":"An"}