PubMed:32094225 / 236-245
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T31","span":{"begin":0,"end":9},"obj":"NN"}],"text":"challenge"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok33","span":{"begin":0,"end":9},"obj":"NN"}],"text":"challenge"}