PubMed:31996494 / 453-458
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T82","span":{"begin":0,"end":5},"obj":"WDT"}],"text":"which"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok96","span":{"begin":0,"end":5},"obj":"WDT"}],"text":"which"}