PMC:7205724 / 146-154 JSONTXT

{"project":"LitCovid-sample-Enju","denotations":[{"id":"T20","span":{"begin":1,"end":2},"obj":"-COMMA-"},{"id":"T21","span":{"begin":3,"end":6},"obj":"CC"}],"relations":[{"id":"R17","pred":"arg1Of","subj":"T21","obj":"T20"}],"text":"s, and c"}