PMC:1064854 / 654-658 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T850","span":{"begin":0,"end":1},"obj":"HYPH"},{"id":"T851","span":{"begin":1,"end":2},"obj":"SYM"}],"text":"/− m"}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T672","span":{"begin":1,"end":2},"obj":"SO_EXT:sequence_nullness_or_absence"}],"text":"/− m"}