PubMed:31967321 / 1321-1326
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T201","span":{"begin":0,"end":5},"obj":"NN"}],"text":"spike"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok217","span":{"begin":0,"end":5},"obj":"NN"}],"text":"spike"}