PMC:1584416 / 373-397 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T140","span":{"begin":4,"end":14},"obj":"NN"},{"id":"T142","span":{"begin":15,"end":17},"obj":"IN"}],"relations":[{"id":"R53","pred":"prep","subj":"T142","obj":"T140"}],"text":"ent difficulty in distin"}