PMC:1315279 / 636-640 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T364","span":{"begin":2,"end":3},"obj":"SYM"},{"id":"T365","span":{"begin":3,"end":4},"obj":"HYPH"}],"text":"68−/"}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T153","span":{"begin":2,"end":3},"obj":"SO_EXT:sequence_nullness_or_absence"}],"text":"68−/"}