PubMed:32064853 / 1478-1484
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T282","span":{"begin":0,"end":6},"obj":"VBN"}],"text":"become"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok318","span":{"begin":0,"end":6},"obj":"VBN"},{"id":"event21","span":{"begin":0,"end":6},"obj":"OCCURRENCE"}],"text":"become"}