PMC:340383 / 452-458 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T305","span":{"begin":4,"end":6},"obj":"NNS"}],"text":"684 bp"}

{"project":"craft-ca-core-dev","denotations":[{"id":"T76","span":{"begin":4,"end":6},"obj":"SO:0000028"}],"text":"684 bp"}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T144","span":{"begin":4,"end":6},"obj":"SO_EXT:0000028"}],"text":"684 bp"}