PMC:1941754 / 452-465 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T210","span":{"begin":3,"end":13},"obj":"NN"}],"text":"is checkpoint"}

{"project":"craft-ca-core-dev","denotations":[{"id":"T21","span":{"begin":3,"end":13},"obj":"GO:0000075"}],"text":"is checkpoint"}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T84","span":{"begin":3,"end":13},"obj":"GO:0000075"}],"text":"is checkpoint"}