PMC:7205724 / 72-79 JSONTXT

{"project":"LitCovid-sample-Enju","denotations":[{"id":"T11","span":{"begin":1,"end":4},"obj":"NN"},{"id":"T12","span":{"begin":5,"end":7},"obj":"IN"}],"relations":[{"id":"R10","pred":"arg1Of","subj":"T11","obj":"T12"}],"text":" use of"}