PMC:7205724 / 1097-1104 JSONTXT

{"project":"LitCovid-sample-Enju","denotations":[{"id":"T167","span":{"begin":0,"end":3},"obj":"NN"},{"id":"T168","span":{"begin":4,"end":6},"obj":"IN"}],"relations":[{"id":"R159","pred":"arg1Of","subj":"T167","obj":"T168"}],"text":"use of "}