PubMed:31996494 / 507-512
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T88","span":{"begin":0,"end":5},"obj":"VBG"}],"text":"using"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok102","span":{"begin":0,"end":5},"obj":"VBG"},{"id":"event2","span":{"begin":0,"end":5},"obj":"OCCURRENCE"}],"text":"using"}