PMC:6988269 / 1361-1390 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T15","span":{"begin":2,"end":14},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"\n\nIntroduction\nAccording to t"}