PMC:7796291 / 30061-30226 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T244","span":{"begin":0,"end":165},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The red dotted line indicates the presumed contribution of mechanical filtration, while the green dotted line indicates the contribution of electrostatic filtration."}