PubMed:32061066 / 2048-2055
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T400","span":{"begin":0,"end":7},"obj":"NN"}],"text":"history"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok456","span":{"begin":0,"end":7},"obj":"NN"}],"text":"history"}