PMC:1084331 / 28193-28194 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T8953","span":{"begin":0,"end":1},"obj":"SYM"}],"text":"−"}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T8596","span":{"begin":0,"end":1},"obj":"SO_EXT:sequence_nullness_or_absence"}],"text":"−"}