PubMed:32004758 / 1233-1237
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T183","span":{"begin":0,"end":4},"obj":"NN"}],"text":"half"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok234","span":{"begin":0,"end":4},"obj":"NN"},{"id":"lookup23","span":{"begin":0,"end":4},"obj":"date_unit"}],"text":"half"}