PMC:1626108 / 51286-51287 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T10427","span":{"begin":0,"end":1},"obj":"SYM"}],"text":"−"}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T10386","span":{"begin":0,"end":1},"obj":"SO_EXT:sequence_nullness_or_absence"}],"text":"−"}