PubMed:32149769 / 364-372
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T52","span":{"begin":0,"end":8},"obj":"NN"}],"text":"obstacle"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok65","span":{"begin":0,"end":8},"obj":"NN"}],"text":"obstacle"}