PubMed:32172226 / 78-88
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T10","span":{"begin":0,"end":10},"obj":"NN"}],"text":"Background"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok13","span":{"begin":0,"end":10},"obj":"NNP"}],"text":"Background"}