PMC:1064854 / 1213-1215 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T964","span":{"begin":0,"end":1},"obj":"SYM"}],"text":"− "}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T701","span":{"begin":0,"end":1},"obj":"SO_EXT:sequence_nullness_or_absence"}],"text":"− "}