PubMed:32052373 / 664-673
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T94","span":{"begin":0,"end":9},"obj":"JJ"}],"text":"necessary"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok111","span":{"begin":0,"end":9},"obj":"JJ"}],"text":"necessary"}