PubMed:32077115 / 1424-1432
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T250","span":{"begin":0,"end":8},"obj":"VBN"}],"text":"observed"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok300","span":{"begin":0,"end":8},"obj":"VBN"},{"id":"event4","span":{"begin":0,"end":8},"obj":"OCCURRENCE"}],"text":"observed"}