PMC:549712 / 886-888 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T413","span":{"begin":1,"end":2},"obj":"SYM"}],"text":" -"}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T220","span":{"begin":1,"end":2},"obj":"SO_EXT:sequence_nullness_or_absence"}],"text":" -"}