PMC:1914394 / 138-163 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T640","span":{"begin":16,"end":21},"obj":"VBN"},{"id":"T641","span":{"begin":2,"end":5},"obj":"VBZ"},{"id":"T642","span":{"begin":6,"end":10},"obj":"RB"},{"id":"T643","span":{"begin":11,"end":15},"obj":"VBN"}],"relations":[{"id":"R21","pred":"aux","subj":"T641","obj":"T640"},{"id":"R22","pred":"advmod","subj":"T642","obj":"T640"},{"id":"R23","pred":"auxpass","subj":"T643","obj":"T640"}],"text":"t has long been known tha"}