PubMed:32174267 / 53-57
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T7","span":{"begin":2,"end":4},"obj":"IN"}],"text":"n of"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok8","span":{"begin":2,"end":4},"obj":"IN"}],"text":"n of"}