PubMed:32141058 / 551-560
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T88","span":{"begin":0,"end":9},"obj":"NN"}],"text":"necessity"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok98","span":{"begin":0,"end":9},"obj":"NN"}],"text":"necessity"}