PubMed:31986264 / 2827-2834
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T558","span":{"begin":0,"end":7},"obj":"NNP"}],"text":"Natural"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok615","span":{"begin":0,"end":7},"obj":"NNP"}],"text":"Natural"}