PMC:149366 / 1575-1581 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T475","span":{"begin":1,"end":5},"obj":"JJ"}],"text":" null "}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T179","span":{"begin":1,"end":5},"obj":"SO_EXT:sequence_nullness"}],"text":" null "}