PubMed:32052373 / 745-752
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T105","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"workers"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok122","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"workers"}