PMC:7267243 / 51-86 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T3","span":{"begin":8,"end":16},"obj":"Sentence"},{"id":"T4","span":{"begin":17,"end":24},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":" et al\n\nAbstract\nSummary\n\nObjective"}