PubMed:32052466 / 821-828
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T127","span":{"begin":0,"end":7},"obj":"NN"}],"text":"vaccine"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok135","span":{"begin":0,"end":7},"obj":"NN"}],"text":"vaccine"}