PMC:1941754 / 14839-14846 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T11345","span":{"begin":4,"end":5},"obj":"SYM"},{"id":"T11346","span":{"begin":5,"end":6},"obj":"HYPH"},{"id":"T11347","span":{"begin":6,"end":7},"obj":"SYM"}],"text":"ei1 −/−"}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T11006","span":{"begin":4,"end":5},"obj":"SO_EXT:sequence_nullness_or_absence"},{"id":"T11007","span":{"begin":6,"end":7},"obj":"SO_EXT:sequence_nullness_or_absence"}],"text":"ei1 −/−"}