PubMed:32031570 / 1668-1676
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T293","span":{"begin":0,"end":8},"obj":"VBD"}],"text":"occurred"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok336","span":{"begin":0,"end":8},"obj":"VBD"},{"id":"event29","span":{"begin":0,"end":8},"obj":"OCCURRENCE"}],"text":"occurred"}