PMC:7551987 / 32428-32467 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T212","span":{"begin":0,"end":39},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Fixed parameters, and their references."}