PMC:7306567 / 108-140 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T2","span":{"begin":18,"end":26},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"n expert opinion\n\nAbstract\nPurpo"}