PubMed:32102777 / 1112-1121
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T176","span":{"begin":0,"end":9},"obj":"NN"}],"text":"variation"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok201","span":{"begin":0,"end":9},"obj":"NN"}],"text":"variation"}