PMC:539061 / 575-589 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T234","span":{"begin":11,"end":13},"obj":"NN"},{"id":"T235","span":{"begin":4,"end":10},"obj":"NN"}],"relations":[{"id":"R81","pred":"compound","subj":"T235","obj":"T234"}],"text":"wth factor β2 "}