PubMed:7903907 / 659-692 JSONTXT

{"project":"jnlpba-st-training","denotations":[{"id":"T7","span":{"begin":0,"end":24},"obj":"cell_type"}],"text":"natural killer (NK) cell activity"}

{"project":"genia-medco-coref","denotations":[{"id":"C9","span":{"begin":0,"end":33},"obj":"NP"}],"text":"natural killer (NK) cell activity"}

{"project":"GENIAcorpus","denotations":[{"id":"T16","span":{"begin":0,"end":24},"obj":"cell_type"}],"text":"natural killer (NK) cell activity"}