PMC:7796329 / 2211-2362 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T19","span":{"begin":19,"end":83},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":", and that John F. Kennedy was assassinated by the Central Intelligence Agency [3]. In the U.S., national opinion polls show that nearly 90% of America"}