PMC:7199903 / 709-717 JSONTXT

{"project":"LitCovid-sample-Enju","denotations":[{"id":"T104","span":{"begin":0,"end":2},"obj":"VB"},{"id":"T105","span":{"begin":3,"end":7},"obj":"VBN"}],"relations":[{"id":"R108","pred":"arg2Of","subj":"T105","obj":"T104"}],"text":"be used "}