PubMed:32110742 / 634-643
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T101","span":{"begin":0,"end":9},"obj":"NN"}],"text":"challenge"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok106","span":{"begin":0,"end":9},"obj":"NN"}],"text":"challenge"}