PMC:7253233 / 88-115 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T3","span":{"begin":7,"end":15},"obj":"Sentence"},{"id":"T4","span":{"begin":16,"end":26},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"tion?\n\nAbstract\nBackground\n"}