PubMed:32050635 / 549-558
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T91","span":{"begin":0,"end":9},"obj":"NNS"}],"text":"countries"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok98","span":{"begin":0,"end":9},"obj":"NNS"}],"text":"countries"}