PMC:149366 / 50-64 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T196","span":{"begin":0,"end":9},"obj":"NN"},{"id":"T199","span":{"begin":10,"end":12},"obj":"IN"}],"relations":[{"id":"R12","pred":"prep","subj":"T199","obj":"T196"}],"text":"retention of s"}