PMC:7143846 / 19239-19365 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T137","span":{"begin":0,"end":126},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"In this study, we compared the difference before and after 20 January on both linguistic categories and psychological profile."}