PMC:7205724 / 478-490 JSONTXT

{"project":"LitCovid-sample-Enju","denotations":[{"id":"T70","span":{"begin":2,"end":3},"obj":"-COMMA-"},{"id":"T71","span":{"begin":4,"end":7},"obj":"CC"}],"relations":[{"id":"R64","pred":"arg1Of","subj":"T71","obj":"T70"}],"text":"ad, and prog"}