PubMed:32176772 / 66-70 JSONTXT

{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T11","span":{"begin":2,"end":3},"obj":"-COMMA-"}],"text":"an, "}

{"project":"LitCovid-TimeML","denotations":[{"id":"tok12","span":{"begin":2,"end":3},"obj":","}],"text":"an, "}