PMC:1315279 / 733-738 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T390","span":{"begin":4,"end":5},"obj":"SYM"}],"text":"am68−"}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T162","span":{"begin":4,"end":5},"obj":"SO_EXT:sequence_nullness_or_absence"}],"text":"am68−"}