PMC:7253233 / 87-114 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T3","span":{"begin":8,"end":16},"obj":"Sentence"},{"id":"T4","span":{"begin":17,"end":27},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"ation?\n\nAbstract\nBackground"}