PMC:314463 / 13578-13585 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T3101","span":{"begin":0,"end":1},"obj":"DT"},{"id":"T3103","span":{"begin":2,"end":6},"obj":"JJ"}],"text":"a null "}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T2508","span":{"begin":2,"end":6},"obj":"SO_EXT:sequence_nullness"}],"text":"a null "}