PubMed:31967321 / 980-988
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T150","span":{"begin":0,"end":8},"obj":"VBD"}],"text":"occurred"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok162","span":{"begin":0,"end":8},"obj":"VBD"},{"id":"event4","span":{"begin":0,"end":8},"obj":"OCCURRENCE"}],"text":"occurred"}