PMC:7796344 / 3117-3137 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T24","span":{"begin":4,"end":6},"obj":"Sentence"},{"id":"T25","span":{"begin":7,"end":19},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"s.\n\n1. Introduction\n"}