PMC:7205724 / 68-80 JSONTXT

{"project":"LitCovid-sample-Enju","denotations":[{"id":"T10","span":{"begin":1,"end":4},"obj":"DT"},{"id":"T11","span":{"begin":5,"end":8},"obj":"NN"},{"id":"T12","span":{"begin":9,"end":11},"obj":"IN"}],"relations":[{"id":"R9","pred":"arg1Of","subj":"T11","obj":"T10"},{"id":"R10","pred":"arg1Of","subj":"T11","obj":"T12"}],"text":" the use of "}