PubMed:31967327 / 564-569
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T92","span":{"begin":0,"end":5},"obj":"VBP"}],"text":"exist"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok98","span":{"begin":0,"end":5},"obj":"VBP"},{"id":"event3","span":{"begin":0,"end":5},"obj":"OCCURRENCE"}],"text":"exist"}