PubMed:32074786 / 166-172
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T27","span":{"begin":0,"end":6},"obj":"VBN"}],"text":"become"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok29","span":{"begin":0,"end":6},"obj":"VBN"},{"id":"event39","span":{"begin":0,"end":6},"obj":"OCCURRENCE"}],"text":"become"}